20274564786 has 32 divisors (see below), whose sum is σ = 49067856000. Its totient is φ = 5451983616.

The previous prime is 20274564773. The next prime is 20274564787. The reversal of 20274564786 is 68746547202.

It is a super-2 number, since 2×20274564786² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20274564787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14197161 + ... + 14198588.

It is an arithmetic number, because the mean of its divisors is an integer number (1533370500).

Almost surely, 2^20274564786 is an apocalyptic number.

20274564786 is an abundant number, since it is smaller than the sum of its proper divisors (28793291214).

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

20274564786 is a wasteful number, since it uses less digits than its factorization.

20274564786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28395778.

The product of its (nonzero) digits is 4515840, while the sum is 51.

The spelling of 20274564786 in words is "twenty billion, two hundred seventy-four million, five hundred sixty-four thousand, seven hundred eighty-six".