21000625011 has 24 divisors (see below), whose sum is σ = 32128147584. Its totient is φ = 13172947200.

The previous prime is 21000625003. The next prime is 21000625049. The reversal of 21000625011 is 11052600012.

21000625011 is a `hidden beast` number, since 2 + 100 + 0 + 62 + 501 + 1 = 666.

It is not a de Polignac number, because 21000625011 - 2³ = 21000625003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000623011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 547710 + ... + 584796.

It is an arithmetic number, because the mean of its divisors is an integer number (1338672816).

Almost surely, 2^21000625011 is an apocalyptic number.

21000625011 is a deficient number, since it is larger than the sum of its proper divisors (11127522573).

21000625011 is a wasteful number, since it uses less digits than its factorization.

21000625011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40811 (or 40808 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The spelling of 21000625011 in words is "twenty-one billion, six hundred twenty-five thousand, eleven".