20000124999 has 6 divisors (see below), whose sum is σ = 28889069456. Its totient is φ = 13333416660.

The previous prime is 20000124979. The next prime is 20000125027. The reversal of 20000124999 is 99942100002.

It is not a de Polignac number, because 20000124999 - 2³² = 15705157703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000124979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111118047 + ... + 1111118064.

Almost surely, 2^20000124999 is an apocalyptic number.

20000124999 is a deficient number, since it is larger than the sum of its proper divisors (8888944457).

20000124999 is a wasteful number, since it uses less digits than its factorization.

20000124999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222236117 (or 2222236114 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The spelling of 20000124999 in words is "twenty billion, one hundred twenty-four thousand, nine hundred ninety-nine".