20412138 has 32 divisors (see below), whose sum is σ = 43436736. Its totient is φ = 6372608.

The previous prime is 20412113. The next prime is 20412149. The reversal of 20412138 is 83121402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29545 + ... + 30227.

It is an arithmetic number, because the mean of its divisors is an integer number (1357398).

Almost surely, 2^20412138 is an apocalyptic number.

20412138 is an abundant number, since it is smaller than the sum of its proper divisors (23024598).

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

20412138 is a wasteful number, since it uses less digits than its factorization.

20412138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20412138 is about 4517.9794156238. The cubic root of 20412138 is about 273.2936233541.

The spelling of 20412138 in words is "twenty million, four hundred twelve thousand, one hundred thirty-eight".