20290803680 has 48 divisors (see below), whose sum is σ = 54785172960. Its totient is φ = 6956846592.

The previous prime is 20290803677. The next prime is 20290803683. The reversal of 20290803680 is 8630809202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20290803677) and next prime (20290803683).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20290803683) 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, 9057275 + ... + 9059514.

It is an arithmetic number, because the mean of its divisors is an integer number (1141357770).

Almost surely, 2^20290803680 is an apocalyptic number.

20290803680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20290803680 is an abundant number, since it is smaller than the sum of its proper divisors (34494369280).

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

20290803680 is a wasteful number, since it uses less digits than its factorization.

20290803680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18116811 (or 18116803 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 20290803680 in words is "twenty billion, two hundred ninety million, eight hundred three thousand, six hundred eighty".