21902451910803 has 24 divisors (see below), whose sum is σ = 33156550271520. Its totient is φ = 13905790588800.

The previous prime is 21902451910799. The next prime is 21902451910811. The reversal of 21902451910803 is 30801915420912.

21902451910803 is a `hidden beast` number, since 2 + 1 + 9 + 0 + 24 + 519 + 108 + 0 + 3 = 666.

It is not a de Polignac number, because 21902451910803 - 2² = 21902451910799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21902451980803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 230976498 + ... + 231071303.

It is an arithmetic number, because the mean of its divisors is an integer number (1381522927980).

Almost surely, 2^{21902451910803} is an apocalyptic number.

21902451910803 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21902451910803 is a deficient number, since it is larger than the sum of its proper divisors (11254098360717).

21902451910803 is a wasteful number, since it uses less digits than its factorization.

21902451910803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462048059 (or 462048056 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 21902451910803 in words is "twenty-one trillion, nine hundred two billion, four hundred fifty-one million, nine hundred ten thousand, eight hundred three".