20802679971 has 8 divisors (see below), whose sum is σ = 27744589584. Its totient is φ = 13864611840.

The previous prime is 20802679943. The next prime is 20802679973. The reversal of 20802679971 is 17997620802.

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

It is not a de Polignac number, because 20802679971 - 2¹⁹ = 20802155683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20802679973) 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, 947710 + ... + 969411.

It is an arithmetic number, because the mean of its divisors is an integer number (3468073698).

Almost surely, 2^20802679971 is an apocalyptic number.

20802679971 is a deficient number, since it is larger than the sum of its proper divisors (6941909613).

20802679971 is a wasteful number, since it uses less digits than its factorization.

20802679971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920741.

The product of its (nonzero) digits is 762048, while the sum is 51.

The spelling of 20802679971 in words is "twenty billion, eight hundred two million, six hundred seventy-nine thousand, nine hundred seventy-one".