21035730624 has 28 divisors (see below), whose sum is σ = 55657037784. Its totient is φ = 7011910144.

The previous prime is 21035730607. The next prime is 21035730631. The reversal of 21035730624 is 42603753012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54780357 + ... + 54780740.

Almost surely, 2^21035730624 is an apocalyptic number.

21035730624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21035730624 is an abundant number, since it is smaller than the sum of its proper divisors (34621307160).

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

21035730624 is a wasteful number, since it uses less digits than its factorization.

21035730624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109561112 (or 109561102 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The spelling of 21035730624 in words is "twenty-one billion, thirty-five million, seven hundred thirty thousand, six hundred twenty-four".