20111193764 has 6 divisors (see below), whose sum is σ = 35194589094. Its totient is φ = 10055596880.

The previous prime is 20111193743. The next prime is 20111193779. The reversal of 20111193764 is 46739111102.

It can be written as a sum of positive squares in only one way, i.e., 17744371264 + 2366822500 = 133208^2 + 48650^2 .

It is a super-2 number, since 2×20111193764² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2513899217 + ... + 2513899224.

It is an arithmetic number, because the mean of its divisors is an integer number (5865764849).

Almost surely, 2^20111193764 is an apocalyptic number.

It is an amenable number.

20111193764 is a deficient number, since it is larger than the sum of its proper divisors (15083395330).

20111193764 is a wasteful number, since it uses less digits than its factorization.

20111193764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5027798445 (or 5027798443 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The spelling of 20111193764 in words is "twenty billion, one hundred eleven million, one hundred ninety-three thousand, seven hundred sixty-four".