20995476 has 48 divisors (see below), whose sum is σ = 52436160. Its totient is φ = 6515200.

The previous prime is 20995439. The next prime is 20995489. The reversal of 20995476 is 67459902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20095 + ... + 21113.

It is an arithmetic number, because the mean of its divisors is an integer number (1092420).

Almost surely, 2^20995476 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 20995476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26218080).

20995476 is an abundant number, since it is smaller than the sum of its proper divisors (31440684).

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

20995476 is a wasteful number, since it uses less digits than its factorization.

20995476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144 (or 1142 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 20995476 is about 4582.0820595009. The cubic root of 20995476 is about 275.8726045121.

The spelling of 20995476 in words is "twenty million, nine hundred ninety-five thousand, four hundred seventy-six".