20492272 has 10 divisors (see below), whose sum is σ = 39703808. Its totient is φ = 10246128.

The previous prime is 20492267. The next prime is 20492273. The reversal of 20492272 is 27229402.

It is a self number, because there is not a number n which added to its sum of digits gives 20492272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20492273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640368 + ... + 640399.

Almost surely, 2^20492272 is an apocalyptic number.

It is an amenable number.

20492272 is a deficient number, since it is larger than the sum of its proper divisors (19211536).

20492272 is a wasteful number, since it uses less digits than its factorization.

20492272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280775 (or 1280769 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20492272 is about 4526.8390737909. The cubic root of 20492272 is about 273.6507885378.

The spelling of 20492272 in words is "twenty million, four hundred ninety-two thousand, two hundred seventy-two".