20542751630 has 32 divisors (see below), whose sum is σ = 38369852928. Its totient is φ = 7912951200.

The previous prime is 20542751627. The next prime is 20542751651. The reversal of 20542751630 is 3615724502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305906 + ... + 366965.

It is an arithmetic number, because the mean of its divisors is an integer number (1199057904).

Almost surely, 2^20542751630 is an apocalyptic number.

20542751630 is a deficient number, since it is larger than the sum of its proper divisors (17827101298).

20542751630 is a wasteful number, since it uses less digits than its factorization.

20542751630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672992.

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 20542751630 in words is "twenty billion, five hundred forty-two million, seven hundred fifty-one thousand, six hundred thirty".