20011019975 has 24 divisors (see below), whose sum is σ = 25136776560. Its totient is φ = 15801246720.

The previous prime is 20011019879. The next prime is 20011019983. The reversal of 20011019975 is 57991011002.

It is a de Polignac number, because none of the positive numbers 2^k-20011019975 is a prime.

It is a congruent number.

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, 908189 + ... + 929961.

It is an arithmetic number, because the mean of its divisors is an integer number (1047365690).

Almost surely, 2^20011019975 is an apocalyptic number.

20011019975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20011019975 is a deficient number, since it is larger than the sum of its proper divisors (5125756585).

20011019975 is a wasteful number, since it uses less digits than its factorization.

20011019975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22259 (or 22254 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 35.

The spelling of 20011019975 in words is "twenty billion, eleven million, nineteen thousand, nine hundred seventy-five".