20101021092 has 36 divisors (see below), whose sum is σ = 50894678016. Its totient is φ = 6689294640.

The previous prime is 20101021019. The next prime is 20101021093. The reversal of 20101021092 is 29012010102.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20101021093) 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, 438084 + ... + 481787.

It is an arithmetic number, because the mean of its divisors is an integer number (1413741056).

Almost surely, 2^20101021092 is an apocalyptic number.

It is an amenable number.

20101021092 is an abundant number, since it is smaller than the sum of its proper divisors (30793656924).

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

20101021092 is a wasteful number, since it uses less digits than its factorization.

20101021092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920488 (or 920483 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 20101021092 its reverse (29012010102), we get a palindrome (49113031194).

The spelling of 20101021092 in words is "twenty billion, one hundred one million, twenty-one thousand, ninety-two".