21346866748 has 24 divisors (see below), whose sum is σ = 39567189312. Its totient is φ = 10042358784.

The previous prime is 21346866733. The next prime is 21346866769. The reversal of 21346866748 is 84766864312.

It is a happy number.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169965 + ... + 267547.

It is an arithmetic number, because the mean of its divisors is an integer number (1648632888).

Almost surely, 2^21346866748 is an apocalyptic number.

It is an amenable number.

21346866748 is a deficient number, since it is larger than the sum of its proper divisors (18220322564).

21346866748 is a wasteful number, since it uses less digits than its factorization.

21346866748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100821 (or 100819 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 55.

The spelling of 21346866748 in words is "twenty-one billion, three hundred forty-six million, eight hundred sixty-six thousand, seven hundred forty-eight".