21694877045 has 8 divisors (see below), whose sum is σ = 26422417824. Its totient is φ = 17096858064.

The previous prime is 21694877011. The next prime is 21694877053. The reversal of 21694877045 is 54077849612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21694877045 - 2²⁴ = 21678099829 is a prime.

It is a Duffinian number.

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, 32380079 + ... + 32380748.

It is an arithmetic number, because the mean of its divisors is an integer number (3302802228).

Almost surely, 2^21694877045 is an apocalyptic number.

It is an amenable number.

21694877045 is a deficient number, since it is larger than the sum of its proper divisors (4727540779).

21694877045 is an equidigital number, since it uses as much as digits as its factorization.

21694877045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64760899.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 21694877045 in words is "twenty-one billion, six hundred ninety-four million, eight hundred seventy-seven thousand, forty-five".