21019732524 has 96 divisors (see below), whose sum is σ = 62306012160. Its totient is φ = 6003196416.

The previous prime is 21019732507. The next prime is 21019732529. The reversal of 21019732524 is 42523791012.

21019732524 is a `hidden beast` number, since 2 + 10 + 1 + 97 + 32 + 524 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (21019732529) 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 31 ways as a sum of consecutive naturals, for example, 2730609 + ... + 2738295.

It is an arithmetic number, because the mean of its divisors is an integer number (649020960).

Almost surely, 2^21019732524 is an apocalyptic number.

It is an amenable number.

21019732524 is an abundant number, since it is smaller than the sum of its proper divisors (41286279636).

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

21019732524 is a wasteful number, since it uses less digits than its factorization.

21019732524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11324 (or 11316 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 21019732524 in words is "twenty-one billion, nineteen million, seven hundred thirty-two thousand, five hundred twenty-four".