20274456280 has 32 divisors (see below), whose sum is σ = 49126568400. Its totient is φ = 7485952896.

The previous prime is 20274456239. The next prime is 20274456311. The reversal of 20274456280 is 8265447202.

It is a super-2 number, since 2×20274456280² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19494150 + ... + 19495189.

Almost surely, 2^20274456280 is an apocalyptic number.

20274456280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20274456280 is an abundant number, since it is smaller than the sum of its proper divisors (28852112120).

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

20274456280 is a wasteful number, since it uses less digits than its factorization.

20274456280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38989363 (or 38989359 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 20274456280 in words is "twenty billion, two hundred seventy-four million, four hundred fifty-six thousand, two hundred eighty".