20521670050 has 24 divisors (see below), whose sum is σ = 43623207936. Its totient is φ = 7036001040.

The previous prime is 20521670041. The next prime is 20521670069. The reversal of 20521670050 is 5007612502.

It is a super-2 number, since 2×20521670050² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29316322 + ... + 29317021.

It is an arithmetic number, because the mean of its divisors is an integer number (1817633664).

Almost surely, 2^20521670050 is an apocalyptic number.

20521670050 is an abundant number, since it is smaller than the sum of its proper divisors (23101537886).

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

20521670050 is a wasteful number, since it uses less digits than its factorization.

20521670050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58633362 (or 58633357 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The spelling of 20521670050 in words is "twenty billion, five hundred twenty-one million, six hundred seventy thousand, fifty".