20130221992 has 32 divisors (see below), whose sum is σ = 39766860000. Its totient is φ = 9526690368.

The previous prime is 20130221983. The next prime is 20130222037. The reversal of 20130221992 is 29912203102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108859 + ... + 228277.

It is an arithmetic number, because the mean of its divisors is an integer number (1242714375).

Almost surely, 2^20130221992 is an apocalyptic number.

It is an amenable number.

20130221992 is a deficient number, since it is larger than the sum of its proper divisors (19636638008).

20130221992 is a wasteful number, since it uses less digits than its factorization.

20130221992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120553 (or 120549 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 20130221992 in words is "twenty billion, one hundred thirty million, two hundred twenty-one thousand, nine hundred ninety-two".