21632027506425 has 72 divisors (see below), whose sum is σ = 44282162468544. Its totient is φ = 9888537041280.

The previous prime is 21632027506423. The next prime is 21632027506429. The reversal of 21632027506425 is 52460572023612.

21632027506425 is a `hidden beast` number, since 2 + 1 + 63 + 20 + 27 + 506 + 42 + 5 = 666.

It is not a de Polignac number, because 21632027506425 - 2¹ = 21632027506423 is a prime.

It is a super-2 number, since 2×21632027506425² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (21632027506423) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 41768359 + ... + 42283091.

Almost surely, 2^{21632027506425} is an apocalyptic number.

21632027506425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21632027506425 is an abundant number, since it is smaller than the sum of its proper divisors (22650134962119).

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

21632027506425 is a wasteful number, since it uses less digits than its factorization.

21632027506425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541439 (or 541431 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 21632027506425 in words is "twenty-one trillion, six hundred thirty-two billion, twenty-seven million, five hundred six thousand, four hundred twenty-five".