20523042 has 24 divisors (see below), whose sum is σ = 45552780. Its totient is φ = 6673920.

The previous prime is 20522987. The next prime is 20523053. The reversal of 20523042 is 24032502.

It can be written as a sum of positive squares in 2 ways, for example, as 19900521 + 622521 = 4461^2 + 789^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13167 + ... + 14642.

Almost surely, 2^20523042 is an apocalyptic number.

20523042 is an abundant number, since it is smaller than the sum of its proper divisors (25029738).

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

20523042 is a wasteful number, since it uses less digits than its factorization.

20523042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27858 (or 27855 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20523042 is about 4530.2364176718. The cubic root of 20523042 is about 273.7876860608.

Adding to 20523042 its reverse (24032502), we get a palindrome (44555544).

The spelling of 20523042 in words is "twenty million, five hundred twenty-three thousand, forty-two".