20138814 has 16 divisors (see below), whose sum is σ = 44753040. Its totient is φ = 6712920.

The previous prime is 20138801. The next prime is 20138819. The reversal of 20138814 is 41883102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20138819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186417 + ... + 186524.

It is an arithmetic number, because the mean of its divisors is an integer number (2797065).

Almost surely, 2^20138814 is an apocalyptic number.

20138814 is an abundant number, since it is smaller than the sum of its proper divisors (24614226).

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

20138814 is a wasteful number, since it uses less digits than its factorization.

20138814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372952 (or 372946 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 20138814 is about 4487.6289953605. The cubic root of 20138814 is about 272.0683129311.

The spelling of 20138814 in words is "twenty million, one hundred thirty-eight thousand, eight hundred fourteen".