20693031 has 16 divisors (see below), whose sum is σ = 28896000. Its totient is φ = 13147200.

The previous prime is 20693003. The next prime is 20693039. The reversal of 20693031 is 13039602.

It is not a de Polignac number, because 20693031 - 2⁶ = 20692967 is a prime.

It is a super-2 number, since 2×20693031² = 856403063933922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20692992 and 20693010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20693039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34131 + ... + 34731.

It is an arithmetic number, because the mean of its divisors is an integer number (1806000).

Almost surely, 2^20693031 is an apocalyptic number.

20693031 is a deficient number, since it is larger than the sum of its proper divisors (8202969).

20693031 is a wasteful number, since it uses less digits than its factorization.

20693031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 20693031 is about 4548.9593315395. The cubic root of 20693031 is about 274.5415214512.

The spelling of 20693031 in words is "twenty million, six hundred ninety-three thousand, thirty-one".