20612155620 has 48 divisors (see below), whose sum is σ = 65958899328. Its totient is φ = 4711349760.

The previous prime is 20612155601. The next prime is 20612155633. The reversal of 20612155620 is 2655121602.

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

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, 24537861 + ... + 24538700.

It is an arithmetic number, because the mean of its divisors is an integer number (1374143736).

Almost surely, 2^20612155620 is an apocalyptic number.

20612155620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20612155620 is an abundant number, since it is smaller than the sum of its proper divisors (45346743708).

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

20612155620 is a wasteful number, since it uses less digits than its factorization.

20612155620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49076580 (or 49076578 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 20612155620 in words is "twenty billion, six hundred twelve million, one hundred fifty-five thousand, six hundred twenty".