20755031 has 4 divisors (see below), whose sum is σ = 22641864. Its totient is φ = 18868200.

The previous prime is 20755019. The next prime is 20755037. The reversal of 20755031 is 13055702.

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 20755031 - 2¹⁰ = 20754007 is a prime.

It is a super-2 number, since 2×20755031² = 861542623621922, 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 = 20754988 and 20755006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20755037) 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, 943400 + ... + 943421.

It is an arithmetic number, because the mean of its divisors is an integer number (5660466).

Almost surely, 2^20755031 is an apocalyptic number.

20755031 is a deficient number, since it is larger than the sum of its proper divisors (1886833).

20755031 is a wasteful number, since it uses less digits than its factorization.

20755031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886832.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 20755031 is about 4555.7689800955. The cubic root of 20755031 is about 274.8154398006.

The spelling of 20755031 in words is "twenty million, seven hundred fifty-five thousand, thirty-one".