20120100993 has 12 divisors (see below), whose sum is σ = 29090901840. Its totient is φ = 13400231256.

The previous prime is 20120100953. The next prime is 20120101031. The reversal of 20120100993 is 39900102102.

It is not a de Polignac number, because 20120100993 - 2¹⁶ = 20120035457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20120100953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1087771 + ... + 1106112.

It is an arithmetic number, because the mean of its divisors is an integer number (2424241820).

Almost surely, 2^20120100993 is an apocalyptic number.

It is an amenable number.

20120100993 is a deficient number, since it is larger than the sum of its proper divisors (8970800847).

20120100993 is a wasteful number, since it uses less digits than its factorization.

20120100993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194908 (or 2194905 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The spelling of 20120100993 in words is "twenty billion, one hundred twenty million, one hundred thousand, nine hundred ninety-three".