20142392 has 8 divisors (see below), whose sum is σ = 37767000. Its totient is φ = 10071192.

The previous prime is 20142389. The next prime is 20142401. The reversal of 20142392 is 29324102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258892 + ... + 1258907.

It is an arithmetic number, because the mean of its divisors is an integer number (4720875).

Almost surely, 2^20142392 is an apocalyptic number.

It is an amenable number.

20142392 is a deficient number, since it is larger than the sum of its proper divisors (17624608).

20142392 is a wasteful number, since it uses less digits than its factorization.

20142392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517805 (or 2517801 counting only the distinct ones).

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

The square root of 20142392 is about 4488.0276291485. The cubic root of 20142392 is about 272.0844244853.

Adding to 20142392 its reverse (29324102), we get a palindrome (49466494).

The spelling of 20142392 in words is "twenty million, one hundred forty-two thousand, three hundred ninety-two".