20157015320402 has 16 divisors (see below), whose sum is σ = 30239770780800. Its totient is φ = 10077091857840.

The previous prime is 20157015320359. The next prime is 20157015320411. The reversal of 20157015320402 is 20402351075102.

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, 795481049 + ... + 795506387.

It is an arithmetic number, because the mean of its divisors is an integer number (1889985673800).

Almost surely, 2^{20157015320402} is an apocalyptic number.

20157015320402 is a deficient number, since it is larger than the sum of its proper divisors (10082755460398).

20157015320402 is a wasteful number, since it uses less digits than its factorization.

20157015320402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65521.

The product of its (nonzero) digits is 16800, while the sum is 32.

Adding to 20157015320402 its reverse (20402351075102), we get a palindrome (40559366395504).

The spelling of 20157015320402 in words is "twenty trillion, one hundred fifty-seven billion, fifteen million, three hundred twenty thousand, four hundred two".