21326029632 has 84 divisors (see below), whose sum is σ = 61688195140. Its totient is φ = 7043438592.

The previous prime is 21326029631. The next prime is 21326029633. The reversal of 21326029632 is 23692062312.

It is a happy number.

21326029632 is a `hidden beast` number, since 2 + 13 + 2 + 6 + 0 + 2 + 9 + 632 = 666.

It is an interprime number because it is at equal distance from previous prime (21326029631) and next prime (21326029633).

It can be written as a sum of positive squares in 2 ways, for example, as 14164808256 + 7161221376 = 119016^2 + 84624^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21326029631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107053 + ... + 232620.

Almost surely, 2^21326029632 is an apocalyptic number.

It is an amenable number.

21326029632 is an abundant number, since it is smaller than the sum of its proper divisors (40362165508).

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

21326029632 is a wasteful number, since it uses less digits than its factorization.

21326029632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339800 (or 339787 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The spelling of 21326029632 in words is "twenty-one billion, three hundred twenty-six million, twenty-nine thousand, six hundred thirty-two".