20591903954 has 8 divisors (see below), whose sum is σ = 30888987888. Its totient is φ = 10295574660.

The previous prime is 20591903953. The next prime is 20591903989. The reversal of 20591903954 is 45930919502.

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

It is a junction number, because it is equal to n+sod(n) for n = 20591903899 and 20591903908.

It is not an unprimeable number, because it can be changed into a prime (20591903951) 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, 114632 + ... + 233075.

It is an arithmetic number, because the mean of its divisors is an integer number (3861123486).

Almost surely, 2^20591903954 is an apocalyptic number.

20591903954 is a deficient number, since it is larger than the sum of its proper divisors (10297083934).

20591903954 is a wasteful number, since it uses less digits than its factorization.

20591903954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377320.

The product of its (nonzero) digits is 437400, while the sum is 47.

The spelling of 20591903954 in words is "twenty billion, five hundred ninety-one million, nine hundred three thousand, nine hundred fifty-four".