20923412 has 12 divisors (see below), whose sum is σ = 36681876. Its totient is φ = 10442880.

The previous prime is 20923411. The next prime is 20923417. The reversal of 20923412 is 21432902.

It can be written as a sum of positive squares in 2 ways, for example, as 13060996 + 7862416 = 3614^2 + 2804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20923411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2039 + ... + 6782.

It is an arithmetic number, because the mean of its divisors is an integer number (3056823).

Almost surely, 2^20923412 is an apocalyptic number.

It is an amenable number.

20923412 is a deficient number, since it is larger than the sum of its proper divisors (15758464).

20923412 is a wasteful number, since it uses less digits than its factorization.

20923412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9418 (or 9416 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20923412 is about 4574.2116260619. The cubic root of 20923412 is about 275.5566114780.

The spelling of 20923412 in words is "twenty million, nine hundred twenty-three thousand, four hundred twelve".