20802464680 has 64 divisors (see below), whose sum is σ = 47089745280. Its totient is φ = 8270572800.

The previous prime is 20802464677. The next prime is 20802464713. The reversal of 20802464680 is 8646420802.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9966597 + ... + 9968683.

It is an arithmetic number, because the mean of its divisors is an integer number (735777270).

Almost surely, 2^20802464680 is an apocalyptic number.

20802464680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20802464680 is an abundant number, since it is smaller than the sum of its proper divisors (26287280600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20802464680 is a wasteful number, since it uses less digits than its factorization.

20802464680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490 (or 3486 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 20802464680 in words is "twenty billion, eight hundred two million, four hundred sixty-four thousand, six hundred eighty".