21051802150 has 24 divisors (see below), whose sum is σ = 39268580400. Its totient is φ = 8396585760.

The previous prime is 21051802147. The next prime is 21051802169. The reversal of 21051802150 is 5120815012.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 585754 + ... + 620653.

It is an arithmetic number, because the mean of its divisors is an integer number (1636190850).

Almost surely, 2^21051802150 is an apocalyptic number.

21051802150 is a deficient number, since it is larger than the sum of its proper divisors (18216778250).

21051802150 is a wasteful number, since it uses less digits than its factorization.

21051802150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206768 (or 1206763 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 25.

The spelling of 21051802150 in words is "twenty-one billion, fifty-one million, eight hundred two thousand, one hundred fifty".