194431314021 has 32 divisors (see below), whose sum is σ = 298419609600. Its totient is φ = 110302321536.

The previous prime is 194431314019. The next prime is 194431314061. The reversal of 194431314021 is 120413134491.

It is not a de Polignac number, because 194431314021 - 2¹ = 194431314019 is a prime.

It is a super-2 number, since 2×194431314021² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194431314061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1858900 + ... + 1960706.

It is an arithmetic number, because the mean of its divisors is an integer number (9325612800).

Almost surely, 2^194431314021 is an apocalyptic number.

It is an amenable number.

194431314021 is a deficient number, since it is larger than the sum of its proper divisors (103988295579).

194431314021 is a wasteful number, since it uses less digits than its factorization.

194431314021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102473.

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 194431314021 in words is "one hundred ninety-four billion, four hundred thirty-one million, three hundred fourteen thousand, twenty-one".