20631203642 has 16 divisors (see below), whose sum is σ = 36905507712. Its totient is φ = 8457511920.

The previous prime is 20631203627. The next prime is 20631203647. The reversal of 20631203642 is 24630213602.

It is not an unprimeable number, because it can be changed into a prime (20631203647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32035709 + ... + 32036352.

It is an arithmetic number, because the mean of its divisors is an integer number (2306594232).

Almost surely, 2^20631203642 is an apocalyptic number.

20631203642 is a deficient number, since it is larger than the sum of its proper divisors (16274304070).

20631203642 is a wasteful number, since it uses less digits than its factorization.

20631203642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64072093.

The product of its (nonzero) digits is 10368, while the sum is 29.

The spelling of 20631203642 in words is "twenty billion, six hundred thirty-one million, two hundred three thousand, six hundred forty-two".