20228574931992 has 96 divisors (see below), whose sum is σ = 62801417153280. Its totient is φ = 5762131784640.

The previous prime is 20228574931987. The next prime is 20228574931997. The reversal of 20228574931992 is 29913947582202.

20228574931992 is a `hidden beast` number, since 2 + 0 + 2 + 2 + 8 + 57 + 493 + 1 + 9 + 92 = 666.

It is an interprime number because it is at equal distance from previous prime (20228574931987) and next prime (20228574931997).

It is a super-4 number, since 4×20228574931992⁴ (a number of 54 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20228574931997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60461668 + ... + 60795315.

It is an arithmetic number, because the mean of its divisors is an integer number (654181428680).

Almost surely, 2^{20228574931992} is an apocalyptic number.

It is an amenable number.

20228574931992 is an abundant number, since it is smaller than the sum of its proper divisors (42572842221288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20228574931992 is a wasteful number, since it uses less digits than its factorization.

20228574931992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121257333 (or 121257326 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 20228574931992 in words is "twenty trillion, two hundred twenty-eight billion, five hundred seventy-four million, nine hundred thirty-one thousand, nine hundred ninety-two".