21000625010 has 16 divisors (see below), whose sum is σ = 37808824896. Its totient is φ = 8398538928.

The previous prime is 21000625003. The next prime is 21000625049. The reversal of 21000625010 is 1052600012.

It is a self number, because there is not a number n which added to its sum of digits gives 21000625010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161732 + ... + 261071.

It is an arithmetic number, because the mean of its divisors is an integer number (2363051556).

Almost surely, 2^21000625010 is an apocalyptic number.

21000625010 is a deficient number, since it is larger than the sum of its proper divisors (16808199886).

21000625010 is a wasteful number, since it uses less digits than its factorization.

21000625010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427777.

The product of its (nonzero) digits is 120, while the sum is 17.

The spelling of 21000625010 in words is "twenty-one billion, six hundred twenty-five thousand, ten".