21103620351 has 16 divisors (see below), whose sum is σ = 30702430848. Its totient is φ = 12787466400.

The previous prime is 21103620341. The next prime is 21103620371. The reversal of 21103620351 is 15302630112.

It is not a de Polignac number, because 21103620351 - 2²³ = 21095231743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103620341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105921 + ... + 231141.

It is an arithmetic number, because the mean of its divisors is an integer number (1918901928).

Almost surely, 2^21103620351 is an apocalyptic number.

21103620351 is a deficient number, since it is larger than the sum of its proper divisors (9598810497).

21103620351 is a wasteful number, since it uses less digits than its factorization.

21103620351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130342.

The product of its (nonzero) digits is 1080, while the sum is 24.

The spelling of 21103620351 in words is "twenty-one billion, one hundred three million, six hundred twenty thousand, three hundred fifty-one".