20501950 has 48 divisors (see below), whose sum is σ = 45889920. Its totient is φ = 6657120.

The previous prime is 20501911. The next prime is 20501981. The reversal of 20501950 is 5910502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5109 + ... + 8191.

It is an arithmetic number, because the mean of its divisors is an integer number (956040).

Almost surely, 2^20501950 is an apocalyptic number.

20501950 is an abundant number, since it is smaller than the sum of its proper divisors (25387970).

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

20501950 is a wasteful number, since it uses less digits than its factorization.

20501950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121 (or 3116 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 20501950 is about 4527.9079054239. The cubic root of 20501950 is about 273.6938612877.

The spelling of 20501950 in words is "twenty million, five hundred one thousand, nine hundred fifty".