20872531730 has 32 divisors (see below), whose sum is σ = 38297344320. Its totient is φ = 8189051200.

The previous prime is 20872531727. The next prime is 20872531741. The reversal of 20872531730 is 3713527802.

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, 11501 + ... + 204639.

It is an arithmetic number, because the mean of its divisors is an integer number (1196792010).

Almost surely, 2^20872531730 is an apocalyptic number.

20872531730 is a deficient number, since it is larger than the sum of its proper divisors (17424812590).

20872531730 is a wasteful number, since it uses less digits than its factorization.

20872531730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193354.

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 20872531730 in words is "twenty billion, eight hundred seventy-two million, five hundred thirty-one thousand, seven hundred thirty".