21003031092 has 96 divisors (see below), whose sum is σ = 51650371584. Its totient is φ = 6634108800.

The previous prime is 21003031037. The next prime is 21003031117. The reversal of 21003031092 is 29013030012.

It is a happy number.

It is a super-2 number, since 2×21003031092² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4309417 + ... + 4314287.

It is an arithmetic number, because the mean of its divisors is an integer number (538024704).

Almost surely, 2^21003031092 is an apocalyptic number.

It is an amenable number.

21003031092 is an abundant number, since it is smaller than the sum of its proper divisors (30647340492).

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

21003031092 is a wasteful number, since it uses less digits than its factorization.

21003031092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5149 (or 5147 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The spelling of 21003031092 in words is "twenty-one billion, three million, thirty-one thousand, ninety-two".