20512101930 has 32 divisors (see below), whose sum is σ = 49501041408. Its totient is φ = 5439672000.

The previous prime is 20512101913. The next prime is 20512101941. The reversal of 20512101930 is 3910121502.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20512101930.

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, 1883346 + ... + 1894205.

It is an arithmetic number, because the mean of its divisors is an integer number (1546907544).

Almost surely, 2^20512101930 is an apocalyptic number.

20512101930 is an abundant number, since it is smaller than the sum of its proper divisors (28988939478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20512101930 is a wasteful number, since it uses less digits than its factorization.

20512101930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777742.

The product of its (nonzero) digits is 540, while the sum is 24.

The spelling of 20512101930 in words is "twenty billion, five hundred twelve million, one hundred one thousand, nine hundred thirty".