20521010650 has 48 divisors (see below), whose sum is σ = 43634082240. Its totient is φ = 7033795200.

The previous prime is 20521010603. The next prime is 20521010659. The reversal of 20521010650 is 5601012502.

It is a super-2 number, since 2×20521010650² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20521010659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1806990 + ... + 1818310.

It is an arithmetic number, because the mean of its divisors is an integer number (909043380).

Almost surely, 2^20521010650 is an apocalyptic number.

20521010650 is an abundant number, since it is smaller than the sum of its proper divisors (23113071590).

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

20521010650 is a wasteful number, since it uses less digits than its factorization.

20521010650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16519 (or 16514 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 20521010650 in words is "twenty billion, five hundred twenty-one million, ten thousand, six hundred fifty".