20157239084297 has 32 divisors (see below), whose sum is σ = 23626684972800. Its totient is φ = 16840887148800.

The previous prime is 20157239084293. The next prime is 20157239084371. The reversal of 20157239084297 is 79248093275102.

It is a cyclic number.

It is not a de Polignac number, because 20157239084297 - 2² = 20157239084293 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20157239084293) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77413079 + ... + 77673027.

It is an arithmetic number, because the mean of its divisors is an integer number (738333905400).

Almost surely, 2^{20157239084297} is an apocalyptic number.

It is an amenable number.

20157239084297 is a deficient number, since it is larger than the sum of its proper divisors (3469445888503).

20157239084297 is a wasteful number, since it uses less digits than its factorization.

20157239084297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261761.

The product of its (nonzero) digits is 15240960, while the sum is 59.

The spelling of 20157239084297 in words is "twenty trillion, one hundred fifty-seven billion, two hundred thirty-nine million, eighty-four thousand, two hundred ninety-seven".