20157005320634 has 64 divisors (see below), whose sum is σ = 37272783744000. Its totient is φ = 7961380704000.

The previous prime is 20157005320631. The next prime is 20157005320687. The reversal of 20157005320634 is 43602350075102.

It is not an unprimeable number, because it can be changed into a prime (20157005320631) 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, 548486492 + ... + 548523240.

It is an arithmetic number, because the mean of its divisors is an integer number (582387246000).

Almost surely, 2^{20157005320634} is an apocalyptic number.

20157005320634 is a deficient number, since it is larger than the sum of its proper divisors (17115778423366).

20157005320634 is a wasteful number, since it uses less digits than its factorization.

20157005320634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41535.

The product of its (nonzero) digits is 151200, while the sum is 38.

Adding to 20157005320634 its reverse (43602350075102), we get a palindrome (63759355395736).

The spelling of 20157005320634 in words is "twenty trillion, one hundred fifty-seven billion, five million, three hundred twenty thousand, six hundred thirty-four".