21625503011 has 16 divisors (see below), whose sum is σ = 26076072960. Its totient is φ = 17519768640.

The previous prime is 21625502981. The next prime is 21625503041. The reversal of 21625503011 is 11030552612.

It is an interprime number because it is at equal distance from previous prime (21625502981) and next prime (21625503041).

It is a cyclic number.

It is not a de Polignac number, because 21625503011 - 2⁶ = 21625502947 is a prime.

It is a super-2 number, since 2×21625503011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21625503041) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 131306 + ... + 245951.

It is an arithmetic number, because the mean of its divisors is an integer number (1629754560).

Almost surely, 2^21625503011 is an apocalyptic number.

21625503011 is a deficient number, since it is larger than the sum of its proper divisors (4450569949).

21625503011 is a wasteful number, since it uses less digits than its factorization.

21625503011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377714.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 21625503011 in words is "twenty-one billion, six hundred twenty-five million, five hundred three thousand, eleven".