20901312 has 84 divisors (see below), whose sum is σ = 60585096. Its totient is φ = 6888960.

The previous prime is 20901301. The next prime is 20901329. The reversal of 20901312 is 21310902.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 75318 + ... + 75594.

Almost surely, 2^20901312 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 20901312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30292548).

20901312 is an abundant number, since it is smaller than the sum of its proper divisors (39683784).

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

20901312 is a wasteful number, since it uses less digits than its factorization.

20901312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 20901312 is about 4571.7952710068. The cubic root of 20901312 is about 275.4595599637.

The spelling of 20901312 in words is "twenty million, nine hundred one thousand, three hundred twelve".