20807533340 has 24 divisors (see below), whose sum is σ = 47668167792. Its totient is φ = 7566375680.

The previous prime is 20807533297. The next prime is 20807533381. The reversal of 20807533340 is 4333570802.

It is a self number, because there is not a number n which added to its sum of digits gives 20807533340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47289629 + ... + 47290068.

It is an arithmetic number, because the mean of its divisors is an integer number (1986173658).

Almost surely, 2^20807533340 is an apocalyptic number.

20807533340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20807533340 is an abundant number, since it is smaller than the sum of its proper divisors (26860634452).

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

20807533340 is a wasteful number, since it uses less digits than its factorization.

20807533340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94579717 (or 94579715 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The spelling of 20807533340 in words is "twenty billion, eight hundred seven million, five hundred thirty-three thousand, three hundred forty".