20902608 has 60 divisors (see below), whose sum is σ = 58805760. Its totient is φ = 6931008.

The previous prime is 20902589. The next prime is 20902633. The reversal of 20902608 is 80620902.

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, 54385 + ... + 54767.

It is an arithmetic number, because the mean of its divisors is an integer number (980096).

Almost surely, 2^20902608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20902608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29402880).

20902608 is an abundant number, since it is smaller than the sum of its proper divisors (37903152).

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

20902608 is a wasteful number, since it uses less digits than its factorization.

20902608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20902608 is about 4571.9370074401. The cubic root of 20902608 is about 275.4652531982.

The spelling of 20902608 in words is "twenty million, nine hundred two thousand, six hundred eight".