20392011 has 6 divisors (see below), whose sum is σ = 29455140. Its totient is φ = 13594668.

The previous prime is 20391979. The next prime is 20392013. The reversal of 20392011 is 11029302.

It is a happy number.

It is not a de Polignac number, because 20392011 - 2⁵ = 20391979 is a prime.

It is a super-2 number, since 2×20392011² = 831668225248242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20392013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1132881 + ... + 1132898.

It is an arithmetic number, because the mean of its divisors is an integer number (4909190).

Almost surely, 2^20392011 is an apocalyptic number.

20392011 is a deficient number, since it is larger than the sum of its proper divisors (9063129).

20392011 is a wasteful number, since it uses less digits than its factorization.

20392011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265785 (or 2265782 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 20392011 is about 4515.7514324861. The cubic root of 20392011 is about 273.2037684899.

The spelling of 20392011 in words is "twenty million, three hundred ninety-two thousand, eleven".