21103088951 has 16 divisors (see below), whose sum is σ = 24398161920. Its totient is φ = 17878259520.

The previous prime is 21103088939. The next prime is 21103089001. The reversal of 21103088951 is 15988030112.

It is a cyclic number.

It is not a de Polignac number, because 21103088951 - 2¹⁰ = 21103087927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103088921) 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, 2242466 + ... + 2251856.

It is an arithmetic number, because the mean of its divisors is an integer number (1524885120).

Almost surely, 2^21103088951 is an apocalyptic number.

21103088951 is a deficient number, since it is larger than the sum of its proper divisors (3295072969).

21103088951 is an equidigital number, since it uses as much as digits as its factorization.

21103088951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13094.

The product of its (nonzero) digits is 17280, while the sum is 38.

The spelling of 21103088951 in words is "twenty-one billion, one hundred three million, eighty-eight thousand, nine hundred fifty-one".