20734208220 has 48 divisors (see below), whose sum is σ = 63333583488. Its totient is φ = 5026474560.

The previous prime is 20734208207. The next prime is 20734208239. The reversal of 20734208220 is 2280243702.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 15707074 + ... + 15708393.

It is an arithmetic number, because the mean of its divisors is an integer number (1319449656).

Almost surely, 2^20734208220 is an apocalyptic number.

20734208220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20734208220 is an abundant number, since it is smaller than the sum of its proper divisors (42599375268).

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

20734208220 is a wasteful number, since it uses less digits than its factorization.

20734208220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31415490 (or 31415488 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The spelling of 20734208220 in words is "twenty billion, seven hundred thirty-four million, two hundred eight thousand, two hundred twenty".