20040420188 has 12 divisors (see below), whose sum is σ = 36280071240. Its totient is φ = 9674685552.

The previous prime is 20040420187. The next prime is 20040420203. The reversal of 20040420188 is 88102404002.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 20040420188.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040420181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86381006 + ... + 86381237.

It is an arithmetic number, because the mean of its divisors is an integer number (3023339270).

Almost surely, 2^20040420188 is an apocalyptic number.

It is an amenable number.

20040420188 is a deficient number, since it is larger than the sum of its proper divisors (16239651052).

20040420188 is a wasteful number, since it uses less digits than its factorization.

20040420188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172762276 (or 172762274 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The spelling of 20040420188 in words is "twenty billion, forty million, four hundred twenty thousand, one hundred eighty-eight".