20402604971 has 8 divisors (see below), whose sum is σ = 23327001600. Its totient is φ = 17480643048.

The previous prime is 20402604949. The next prime is 20402604977. The reversal of 20402604971 is 17940620402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20402604971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20402604977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590681 + ... + 624266.

It is an arithmetic number, because the mean of its divisors is an integer number (2915875200).

Almost surely, 2^20402604971 is an apocalyptic number.

20402604971 is a deficient number, since it is larger than the sum of its proper divisors (2924396629).

20402604971 is a wasteful number, since it uses less digits than its factorization.

20402604971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217353.

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 20402604971 in words is "twenty billion, four hundred two million, six hundred four thousand, nine hundred seventy-one".