21860701632 has 560 divisors, whose sum is σ = 81959500800. Its totient is φ = 5666250240.

The previous prime is 21860701627. The next prime is 21860701633. The reversal of 21860701632 is 23610706812.

21860701632 is a `hidden beast` number, since 2 + 1 + 8 + 607 + 0 + 16 + 32 = 666.

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 (21860701633) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 45637969 + ... + 45638447.

Almost surely, 2^21860701632 is an apocalyptic number.

21860701632 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21860701632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40979750400).

21860701632 is an abundant number, since it is smaller than the sum of its proper divisors (60098799168).

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

21860701632 is an equidigital number, since it uses as much as digits as its factorization.

21860701632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 21860701632 in words is "twenty-one billion, eight hundred sixty million, seven hundred one thousand, six hundred thirty-two".