20146993915 has 8 divisors (see below), whose sum is σ = 24690784320. Its totient is φ = 15774667392.

The previous prime is 20146993903. The next prime is 20146993931. The reversal of 20146993915 is 51939964102.

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

It is a cyclic number.

It is not a de Polignac number, because 20146993915 - 2³¹ = 17999510267 is a prime.

It is a super-2 number, since 2×20146993915² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42865710 + ... + 42866179.

It is an arithmetic number, because the mean of its divisors is an integer number (3086348040).

Almost surely, 2^20146993915 is an apocalyptic number.

20146993915 is a deficient number, since it is larger than the sum of its proper divisors (4543790405).

20146993915 is an equidigital number, since it uses as much as digits as its factorization.

20146993915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85731941.

The product of its (nonzero) digits is 524880, while the sum is 49.

The spelling of 20146993915 in words is "twenty billion, one hundred forty-six million, nine hundred ninety-three thousand, nine hundred fifteen".