20447231994 has 48 divisors (see below), whose sum is σ = 50814112128. Its totient is φ = 5820965856.

The previous prime is 20447231977. The next prime is 20447232011. The reversal of 20447231994 is 49913274402.

20447231994 is a `hidden beast` number, since 204 + 47 + 2 + 319 + 94 = 666.

It is an interprime number because it is at equal distance from previous prime (20447231977) and next prime (20447232011).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 258022 + ... + 327825.

It is an arithmetic number, because the mean of its divisors is an integer number (1058627336).

Almost surely, 2^20447231994 is an apocalyptic number.

20447231994 is an abundant number, since it is smaller than the sum of its proper divisors (30366880134).

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

20447231994 is a wasteful number, since it uses less digits than its factorization.

20447231994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586139 (or 586136 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 20447231994 in words is "twenty billion, four hundred forty-seven million, two hundred thirty-one thousand, nine hundred ninety-four".