21300892802 has 54 divisors (see below), whose sum is σ = 38914849449. Its totient is φ = 8718420480.

The previous prime is 21300892793. The next prime is 21300892891. The reversal of 21300892802 is 20829800312.

It can be written as a sum of positive squares in 2 ways, for example, as 16964802001 + 4336090801 = 130249^2 + 65849^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=103201.

It is a super-2 number, since 2×21300892802² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 33230402 + ... + 33231042.

Almost surely, 2^21300892802 is an apocalyptic number.

21300892802 is a deficient number, since it is larger than the sum of its proper divisors (17613956647).

21300892802 is an frugal number, since it uses more digits than its factorization.

21300892802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 21300892802 in words is "twenty-one billion, three hundred million, eight hundred ninety-two thousand, eight hundred two".