20193031 has 4 divisors (see below), whose sum is σ = 20393064. Its totient is φ = 19993000.

The previous prime is 20193007. The next prime is 20193037. The reversal of 20193031 is 13039102.

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 20193031 - 2⁹ = 20192519 is a prime.

It is a super-2 number, since 2×20193031² = 815517001933922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20193037) 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, 99865 + ... + 100066.

It is an arithmetic number, because the mean of its divisors is an integer number (5098266).

Almost surely, 2^20193031 is an apocalyptic number.

20193031 is a deficient number, since it is larger than the sum of its proper divisors (200033).

20193031 is a wasteful number, since it uses less digits than its factorization.

20193031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200032.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 20193031 is about 4493.6656528941. The cubic root of 20193031 is about 272.3122450441.

It can be divided in two parts, 2019 and 3031, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 20193031 in words is "twenty million, one hundred ninety-three thousand, thirty-one".