20447231995 has 8 divisors (see below), whose sum is σ = 25828082640. Its totient is φ = 15496849440.

The previous prime is 20447231977. The next prime is 20447232011. The reversal of 20447231995 is 59913274402.

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

It is not a de Polignac number, because 20447231995 - 2⁵ = 20447231963 is a prime.

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, 107616916 + ... + 107617105.

It is an arithmetic number, because the mean of its divisors is an integer number (3228510330).

Almost surely, 2^20447231995 is an apocalyptic number.

20447231995 is a deficient number, since it is larger than the sum of its proper divisors (5380850645).

20447231995 is a wasteful number, since it uses less digits than its factorization.

20447231995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215234045.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 20447231995 in words is "twenty billion, four hundred forty-seven million, two hundred thirty-one thousand, nine hundred ninety-five".