20349425 has 12 divisors (see below), whose sum is σ = 26718156. Its totient is φ = 15321600.

The previous prime is 20349421. The next prime is 20349431. The reversal of 20349425 is 52494302.

It can be written as a sum of positive squares in 6 ways, for example, as 1129969 + 19219456 = 1063^2 + 4384^2 .

It is not a de Polignac number, because 20349425 - 2² = 20349421 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20349421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23516 + ... + 24365.

It is an arithmetic number, because the mean of its divisors is an integer number (2226513).

Almost surely, 2^20349425 is an apocalyptic number.

20349425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20349425 is a deficient number, since it is larger than the sum of its proper divisors (6368731).

20349425 is a wasteful number, since it uses less digits than its factorization.

20349425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47908 (or 47903 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 20349425 is about 4511.0336952854. The cubic root of 20349425 is about 273.0134527132.

The spelling of 20349425 in words is "twenty million, three hundred forty-nine thousand, four hundred twenty-five".