21203624075 has 6 divisors (see below), whose sum is σ = 26292493884. Its totient is φ = 16962899240.

The previous prime is 21203624027. The next prime is 21203624131. The reversal of 21203624075 is 57042630212.

It is not a de Polignac number, because 21203624075 - 2⁶ = 21203624011 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 424072457 + ... + 424072506.

It is an arithmetic number, because the mean of its divisors is an integer number (4382082314).

Almost surely, 2^21203624075 is an apocalyptic number.

21203624075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21203624075 is a deficient number, since it is larger than the sum of its proper divisors (5088869809).

21203624075 is an equidigital number, since it uses as much as digits as its factorization.

21203624075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848144973 (or 848144968 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 21203624075 in words is "twenty-one billion, two hundred three million, six hundred twenty-four thousand, seventy-five".