21103610057 has 8 divisors (see below), whose sum is σ = 21263973120. Its totient is φ = 20943518400.

The previous prime is 21103610051. The next prime is 21103610063. The reversal of 21103610057 is 75001630112.

It is an interprime number because it is at equal distance from previous prime (21103610051) and next prime (21103610063).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21103610057 - 2⁶ = 21103609993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103610051) 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 7 ways as a sum of consecutive naturals, for example, 89633 + ... + 224145.

It is an arithmetic number, because the mean of its divisors is an integer number (2657996640).

Almost surely, 2^21103610057 is an apocalyptic number.

It is an amenable number.

21103610057 is a deficient number, since it is larger than the sum of its proper divisors (160363063).

21103610057 is a wasteful number, since it uses less digits than its factorization.

21103610057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135703.

The product of its (nonzero) digits is 1260, while the sum is 26.

The spelling of 21103610057 in words is "twenty-one billion, one hundred three million, six hundred ten thousand, fifty-seven".