21067552075 has 24 divisors (see below), whose sum is σ = 27347463936. Its totient is φ = 16069284000.

The previous prime is 21067552069. The next prime is 21067552081. The reversal of 21067552075 is 57025576012.

It is an interprime number because it is at equal distance from previous prime (21067552069) and next prime (21067552081).

It is not a de Polignac number, because 21067552075 - 2³ = 21067552067 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119920 + ... + 237730.

It is an arithmetic number, because the mean of its divisors is an integer number (1139477664).

Almost surely, 2^21067552075 is an apocalyptic number.

21067552075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21067552075 is a deficient number, since it is larger than the sum of its proper divisors (6279911861).

21067552075 is a wasteful number, since it uses less digits than its factorization.

21067552075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118155 (or 118150 counting only the distinct ones).

The product of its (nonzero) digits is 147000, while the sum is 40.

The spelling of 21067552075 in words is "twenty-one billion, sixty-seven million, five hundred fifty-two thousand, seventy-five".