20947612 has 24 divisors (see below), whose sum is σ = 42184800. Its totient is φ = 8915520.

The previous prime is 20947609. The next prime is 20947613. The reversal of 20947612 is 21674902.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20947613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1662 + ... + 6682.

It is an arithmetic number, because the mean of its divisors is an integer number (1757700).

Almost surely, 2^20947612 is an apocalyptic number.

It is an amenable number.

20947612 is an abundant number, since it is smaller than the sum of its proper divisors (21237188).

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

20947612 is a wasteful number, since it uses less digits than its factorization.

20947612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5181 (or 5179 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20947612 is about 4576.8561262072. The cubic root of 20947612 is about 275.6628067253.

The spelling of 20947612 in words is "twenty million, nine hundred forty-seven thousand, six hundred twelve".