21446261025 has 96 divisors (see below), whose sum is σ = 41151294720. Its totient is φ = 9653022720.

The previous prime is 21446260973. The next prime is 21446261029. The reversal of 21446261025 is 52016264412.

It is not a de Polignac number, because 21446261025 - 2⁷ = 21446260897 is a prime.

It is a super-2 number, since 2×21446261025² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21446261029) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12941997 + ... + 12943653.

It is an arithmetic number, because the mean of its divisors is an integer number (428659320).

Almost surely, 2^21446261025 is an apocalyptic number.

21446261025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21446261025 is a deficient number, since it is larger than the sum of its proper divisors (19705033695).

21446261025 is a wasteful number, since it uses less digits than its factorization.

21446261025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043 (or 2038 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The spelling of 21446261025 in words is "twenty-one billion, four hundred forty-six million, two hundred sixty-one thousand, twenty-five".