20349693 has 24 divisors (see below), whose sum is σ = 36178688. Its totient is φ = 10733472.

The previous prime is 20349683. The next prime is 20349737. The reversal of 20349693 is 39694302.

It is a happy number.

It is not a de Polignac number, because 20349693 - 2¹⁷ = 20218621 is a prime.

It is a super-2 number, since 2×20349693² = 828220010388498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20349613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11605 + ... + 13242.

Almost surely, 2^20349693 is an apocalyptic number.

It is an amenable number.

20349693 is a deficient number, since it is larger than the sum of its proper divisors (15828995).

20349693 is a wasteful number, since it uses less digits than its factorization.

20349693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24873 (or 24870 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 20349693 is about 4511.0634001308. The cubic root of 20349693 is about 273.0146512283.

The spelling of 20349693 in words is "twenty million, three hundred forty-nine thousand, six hundred ninety-three".