20142504 has 48 divisors (see below), whose sum is σ = 56034420. Its totient is φ = 6531840.

The previous prime is 20142481. The next prime is 20142509. The reversal of 20142504 is 40524102.

20142504 is a `hidden beast` number, since 20 + 142 + 504 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19980900 + 161604 = 4470^2 + 402^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20142509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1117 + ... + 6444.

Almost surely, 2^20142504 is an apocalyptic number.

20142504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20142504 is an abundant number, since it is smaller than the sum of its proper divisors (35891916).

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

20142504 is a wasteful number, since it uses less digits than its factorization.

20142504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7610 (or 7603 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 20142504 is about 4488.0401067727. The cubic root of 20142504 is about 272.0849287849.

Adding to 20142504 its reverse (40524102), we get a palindrome (60666606).

The spelling of 20142504 in words is "twenty million, one hundred forty-two thousand, five hundred four".