20196031 has 4 divisors (see below), whose sum is σ = 21259000. Its totient is φ = 19133064.

The previous prime is 20195971. The next prime is 20196049. The reversal of 20196031 is 13069102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20196031 - 2²¹ = 18098879 is a prime.

It is a super-2 number, since 2×20196031² = 815759336305922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20195993 and 20196011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20196091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531456 + ... + 531493.

It is an arithmetic number, because the mean of its divisors is an integer number (5314750).

Almost surely, 2^20196031 is an apocalyptic number.

20196031 is a deficient number, since it is larger than the sum of its proper divisors (1062969).

20196031 is a wasteful number, since it uses less digits than its factorization.

20196031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062968.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 20196031 is about 4493.9994437027. Note that the first 3 decimals coincide. The cubic root of 20196031 is about 272.3257298330.

The spelling of 20196031 in words is "twenty million, one hundred ninety-six thousand, thirty-one".