20620341620 has 48 divisors (see below), whose sum is σ = 43589145600. Its totient is φ = 8193749760.

The previous prime is 20620341619. The next prime is 20620341659. The reversal of 20620341620 is 2614302602.

It is a self number, because there is not a number n which added to its sum of digits gives 20620341620.

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, 2055176 + ... + 2065184.

It is an arithmetic number, because the mean of its divisors is an integer number (908107200).

Almost surely, 2^20620341620 is an apocalyptic number.

20620341620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20620341620 is an abundant number, since it is smaller than the sum of its proper divisors (22968803980).

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

20620341620 is a wasteful number, since it uses less digits than its factorization.

20620341620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10688 (or 10686 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The spelling of 20620341620 in words is "twenty billion, six hundred twenty million, three hundred forty-one thousand, six hundred twenty".