20735628 has 12 divisors (see below), whose sum is σ = 48383160. Its totient is φ = 6911872.

The previous prime is 20735623. The next prime is 20735639. The reversal of 20735628 is 82653702.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20735623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 863973 + ... + 863996.

It is an arithmetic number, because the mean of its divisors is an integer number (4031930).

Almost surely, 2^20735628 is an apocalyptic number.

It is an amenable number.

20735628 is an abundant number, since it is smaller than the sum of its proper divisors (27647532).

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

20735628 is a wasteful number, since it uses less digits than its factorization.

20735628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727976 (or 1727974 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20735628 is about 4553.6389843728. The cubic root of 20735628 is about 274.7297753261.

The spelling of 20735628 in words is "twenty million, seven hundred thirty-five thousand, six hundred twenty-eight".