20740031 has 8 divisors (see below), whose sum is σ = 22390704. Its totient is φ = 19097280.

The previous prime is 20740021. The next prime is 20740063. The reversal of 20740031 is 13004702.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20740031 is a prime.

It is a super-2 number, since 2×20740031² = 860297771761922, 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 = 20739991 and 20740009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4196 + ... + 7686.

It is an arithmetic number, because the mean of its divisors is an integer number (2798838).

Almost surely, 2^20740031 is an apocalyptic number.

20740031 is a deficient number, since it is larger than the sum of its proper divisors (1650673).

20740031 is a wasteful number, since it uses less digits than its factorization.

20740031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20740031 is about 4554.1224182053. The cubic root of 20740031 is about 274.7492193090.

Adding to 20740031 its reverse (13004702), we get a palindrome (33744733).

The spelling of 20740031 in words is "twenty million, seven hundred forty thousand, thirty-one".