20101909192 has 8 divisors (see below), whose sum is σ = 37691079750. Its totient is φ = 10050954592.

The previous prime is 20101909189. The next prime is 20101909231. The reversal of 20101909192 is 29190910102.

It can be written as a sum of positive squares in only one way, i.e., 14415844356 + 5686064836 = 120066^2 + 75406^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256369317 + ... + 1256369332.

Almost surely, 2^20101909192 is an apocalyptic number.

It is an amenable number.

20101909192 is a deficient number, since it is larger than the sum of its proper divisors (17589170558).

20101909192 is a wasteful number, since it uses less digits than its factorization.

20101909192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512738655 (or 2512738651 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 34.

The spelling of 20101909192 in words is "twenty billion, one hundred one million, nine hundred nine thousand, one hundred ninety-two".