21709302946 has 8 divisors (see below), whose sum is σ = 32564585664. Its totient is φ = 10854441060.

The previous prime is 21709302931. The next prime is 21709302977. The reversal of 21709302946 is 64920390712.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121251 + ... + 241081.

It is an arithmetic number, because the mean of its divisors is an integer number (4070573208).

Almost surely, 2^21709302946 is an apocalyptic number.

21709302946 is a deficient number, since it is larger than the sum of its proper divisors (10855282718).

21709302946 is a wasteful number, since it uses less digits than its factorization.

21709302946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210416.

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 21709302946 in words is "twenty-one billion, seven hundred nine million, three hundred two thousand, nine hundred forty-six".