194400020 has 24 divisors (see below), whose sum is σ = 429727200. Its totient is φ = 73667232.

The previous prime is 194399987. The next prime is 194400023. The reversal of 194400020 is 20004491.

194400020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 194399965 and 194400001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194400023) 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, 255410 + ... + 256169.

It is an arithmetic number, because the mean of its divisors is an integer number (17905300).

Almost surely, 2^194400020 is an apocalyptic number.

194400020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194400020 is an abundant number, since it is smaller than the sum of its proper divisors (235327180).

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

194400020 is a wasteful number, since it uses less digits than its factorization.

194400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511607 (or 511605 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 194400020 is about 13942.7407635658. The cubic root of 194400020 is about 579.2936506294.

The spelling of 194400020 in words is "one hundred ninety-four million, four hundred thousand, twenty".