20031894 has 32 divisors (see below), whose sum is σ = 45555840. Its totient is φ = 6521256.

The previous prime is 20031883. The next prime is 20031901. The reversal of 20031894 is 49813002.

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

It is a congruent number.

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, 1992 + ... + 6635.

It is an arithmetic number, because the mean of its divisors is an integer number (1423620).

Almost surely, 2^20031894 is an apocalyptic number.

20031894 is an abundant number, since it is smaller than the sum of its proper divisors (25523946).

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

20031894 is a wasteful number, since it uses less digits than its factorization.

20031894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8681 (or 8675 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20031894 is about 4475.7003921174. The cubic root of 20031894 is about 271.5859744204.

Adding to 20031894 its reverse (49813002), we get a palindrome (69844896).

The spelling of 20031894 in words is "twenty million, thirty-one thousand, eight hundred ninety-four".