20729950 has 24 divisors (see below), whose sum is σ = 40588920. Its totient is φ = 7855200.

The previous prime is 20729939. The next prime is 20729981. The reversal of 20729950 is 5992702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9961 + ... + 11860.

It is an arithmetic number, because the mean of its divisors is an integer number (1691205).

Almost surely, 2^20729950 is an apocalyptic number.

20729950 is a deficient number, since it is larger than the sum of its proper divisors (19858970).

20729950 is a wasteful number, since it uses less digits than its factorization.

20729950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21852 (or 21847 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 20729950 is about 4553.0154842697. The cubic root of 20729950 is about 274.7046967822.

The spelling of 20729950 in words is "twenty million, seven hundred twenty-nine thousand, nine hundred fifty".