21350770275 has 24 divisors (see below), whose sum is σ = 36438651904. Its totient is φ = 11019751200.

The previous prime is 21350770241. The next prime is 21350770277. The reversal of 21350770275 is 57207705312.

It is not a de Polignac number, because 21350770275 - 2¹² = 21350766179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21350770277) 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 23 ways as a sum of consecutive naturals, for example, 4589239 + ... + 4593888.

Almost surely, 2^21350770275 is an apocalyptic number.

21350770275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21350770275 is a deficient number, since it is larger than the sum of its proper divisors (15087881629).

21350770275 is a wasteful number, since it uses less digits than its factorization.

21350770275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9183171 (or 9183166 counting only the distinct ones).

The product of its (nonzero) digits is 102900, while the sum is 39.

The spelling of 21350770275 in words is "twenty-one billion, three hundred fifty million, seven hundred seventy thousand, two hundred seventy-five".