20142628 has 18 divisors (see below), whose sum is σ = 38746358. Its totient is φ = 9155520.

The previous prime is 20142613. The next prime is 20142673. The reversal of 20142628 is 82624102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20142144 + 484 = 4488^2 + 22^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 20325 + ... + 21292.

Almost surely, 2^20142628 is an apocalyptic number.

It is an amenable number.

20142628 is a deficient number, since it is larger than the sum of its proper divisors (18603730).

20142628 is a wasteful number, since it uses less digits than its factorization.

20142628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41643 (or 41630 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 20142628 is about 4488.0539212447. The cubic root of 20142628 is about 272.0854871144.

The spelling of 20142628 in words is "twenty million, one hundred forty-two thousand, six hundred twenty-eight".