20923442 has 8 divisors (see below), whose sum is σ = 32467500. Its totient is φ = 10100944.

The previous prime is 20923429. The next prime is 20923459. The reversal of 20923442 is 24432902.

It can be written as a sum of positive squares in 2 ways, for example, as 19456921 + 1466521 = 4411^2 + 1211^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180317 + ... + 180432.

Almost surely, 2^20923442 is an apocalyptic number.

20923442 is a deficient number, since it is larger than the sum of its proper divisors (11544058).

20923442 is a wasteful number, since it uses less digits than its factorization.

20923442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360780.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20923442 is about 4574.2149053144. The cubic root of 20923442 is about 275.5567431757.

The spelling of 20923442 in words is "twenty million, nine hundred twenty-three thousand, four hundred forty-two".