20656153076440 has 32 divisors (see below), whose sum is σ = 53115822197280. Its totient is φ = 7082109626112.

The previous prime is 20656153076399. The next prime is 20656153076497. The reversal of 20656153076440 is 4467035165602.

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, 36885987357 + ... + 36885987916.

It is an arithmetic number, because the mean of its divisors is an integer number (1659869443665).

Almost surely, 2^{20656153076440} is an apocalyptic number.

20656153076440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20656153076440 is an abundant number, since it is smaller than the sum of its proper divisors (32459669120840).

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

20656153076440 is a wasteful number, since it uses less digits than its factorization.

20656153076440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73771975291 (or 73771975287 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 20656153076440 in words is "twenty trillion, six hundred fifty-six billion, one hundred fifty-three million, seventy-six thousand, four hundred forty".