20601138 has 16 divisors (see below), whose sum is σ = 41588640. Its totient is φ = 6802656.

The previous prime is 20601079. The next prime is 20601157. The reversal of 20601138 is 83110602.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15403 + ... + 16686.

It is an arithmetic number, because the mean of its divisors is an integer number (2599290).

Almost surely, 2^20601138 is an apocalyptic number.

20601138 is an abundant number, since it is smaller than the sum of its proper divisors (20987502).

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

20601138 is a wasteful number, since it uses less digits than its factorization.

20601138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32201.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20601138 is about 4538.8476511115. The cubic root of 20601138 is about 274.1345264422.

The spelling of 20601138 in words is "twenty million, six hundred one thousand, one hundred thirty-eight".