12051899894 has 8 divisors (see below), whose sum is σ = 18462485088. Its totient is φ = 5897738200.

The previous prime is 12051899891. The next prime is 12051899897. The reversal of 12051899894 is 49899815021.

It is an interprime number because it is at equal distance from previous prime (12051899891) and next prime (12051899897).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12051899894² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12051899891) 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, 64105757 + ... + 64105944.

It is an arithmetic number, because the mean of its divisors is an integer number (2307810636).

Almost surely, 2^12051899894 is an apocalyptic number.

12051899894 is a deficient number, since it is larger than the sum of its proper divisors (6410585194).

12051899894 is a wasteful number, since it uses less digits than its factorization.

12051899894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128211750.

The product of its (nonzero) digits is 1866240, while the sum is 56.

The spelling of 12051899894 in words is "twelve billion, fifty-one million, eight hundred ninety-nine thousand, eight hundred ninety-four".