20614635820 has 24 divisors (see below), whose sum is σ = 43301178144. Its totient is φ = 8243865216.

The previous prime is 20614635779. The next prime is 20614635823. The reversal of 20614635820 is 2853641602.

It is a self number, because there is not a number n which added to its sum of digits gives 20614635820.

It is not an unprimeable number, because it can be changed into a prime (20614635823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37872 + ... + 206551.

It is an arithmetic number, because the mean of its divisors is an integer number (1804215756).

Almost surely, 2^20614635820 is an apocalyptic number.

20614635820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20614635820 is an abundant number, since it is smaller than the sum of its proper divisors (22686542324).

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

20614635820 is a wasteful number, since it uses less digits than its factorization.

20614635820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248649 (or 248647 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 20614635820 in words is "twenty billion, six hundred fourteen million, six hundred thirty-five thousand, eight hundred twenty".