20031693 has 16 divisors (see below), whose sum is σ = 29409600. Its totient is φ = 12026880.

The previous prime is 20031667. The next prime is 20031701. The reversal of 20031693 is 39613002.

It is not a de Polignac number, because 20031693 - 2⁶ = 20031629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031293) 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, 813 + ... + 6381.

It is an arithmetic number, because the mean of its divisors is an integer number (1838100).

Almost surely, 2^20031693 is an apocalyptic number.

It is an amenable number.

20031693 is a deficient number, since it is larger than the sum of its proper divisors (9377907).

20031693 is a wasteful number, since it uses less digits than its factorization.

20031693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5692.

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

The square root of 20031693 is about 4475.6779374749. The cubic root of 20031693 is about 271.5850660529.

Adding to 20031693 its reverse (39613002), we get a palindrome (59644695).

The spelling of 20031693 in words is "twenty million, thirty-one thousand, six hundred ninety-three".