20749614220 has 24 divisors (see below), whose sum is σ = 45468720864. Its totient is φ = 7938982656.

The previous prime is 20749614211. The next prime is 20749614233. The reversal of 20749614220 is 2241694702.

It is a self number, because there is not a number n which added to its sum of digits gives 20749614220.

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, 22553469 + ... + 22554388.

It is an arithmetic number, because the mean of its divisors is an integer number (1894530036).

Almost surely, 2^20749614220 is an apocalyptic number.

20749614220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20749614220 is an abundant number, since it is smaller than the sum of its proper divisors (24719106644).

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

20749614220 is a wasteful number, since it uses less digits than its factorization.

20749614220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45107889 (or 45107887 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 20749614220 in words is "twenty billion, seven hundred forty-nine million, six hundred fourteen thousand, two hundred twenty".