20349069 has 16 divisors (see below), whose sum is σ = 29330112. Its totient is φ = 12475008.

The previous prime is 20349061. The next prime is 20349103. The reversal of 20349069 is 96094302.

It is not a de Polignac number, because 20349069 - 2³ = 20349061 is a prime.

It is a super-2 number, since 2×20349069² = 828169218333522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20349061) 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, 11374 + ... + 13040.

It is an arithmetic number, because the mean of its divisors is an integer number (1833132).

Almost surely, 2^20349069 is an apocalyptic number.

It is an amenable number.

20349069 is a deficient number, since it is larger than the sum of its proper divisors (8981043).

20349069 is a wasteful number, since it uses less digits than its factorization.

20349069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 20349069 is about 4510.9942363076. The cubic root of 20349069 is about 273.0118606394.

The spelling of 20349069 in words is "twenty million, three hundred forty-nine thousand, sixty-nine".