20616354574 has 16 divisors (see below), whose sum is σ = 31602217536. Its totient is φ = 10082556000.

The previous prime is 20616354557. The next prime is 20616354593. The reversal of 20616354574 is 47545361602.

It is a self number, because there is not a number n which added to its sum of digits gives 20616354574.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84724 + ... + 220024.

It is an arithmetic number, because the mean of its divisors is an integer number (1975138596).

Almost surely, 2^20616354574 is an apocalyptic number.

20616354574 is a deficient number, since it is larger than the sum of its proper divisors (10985862962).

20616354574 is a wasteful number, since it uses less digits than its factorization.

20616354574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136971.

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 20616354574 in words is "twenty billion, six hundred sixteen million, three hundred fifty-four thousand, five hundred seventy-four".