20913192 has 48 divisors (see below), whose sum is σ = 57451680. Its totient is φ = 6871200.

The previous prime is 20913181. The next prime is 20913203. The reversal of 20913192 is 29131902.

It is an interprime number because it is at equal distance from previous prime (20913181) and next prime (20913203).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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, 3067 + ... + 7157.

It is an arithmetic number, because the mean of its divisors is an integer number (1196910).

Almost surely, 2^20913192 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 20913192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28725840).

20913192 is an abundant number, since it is smaller than the sum of its proper divisors (36538488).

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

20913192 is a wasteful number, since it uses less digits than its factorization.

20913192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174 (or 4167 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 20913192 is about 4573.0943572159. The cubic root of 20913192 is about 275.5117391405.

The spelling of 20913192 in words is "twenty million, nine hundred thirteen thousand, one hundred ninety-two".