20426349 has 16 divisors (see below), whose sum is σ = 29067200. Its totient is φ = 12721536.

The previous prime is 20426321. The next prime is 20426389. The reversal of 20426349 is 94362402.

It is not a de Polignac number, because 20426349 - 2⁵ = 20426317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426309) 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, 1707 + ... + 6615.

It is an arithmetic number, because the mean of its divisors is an integer number (1816700).

Almost surely, 2^20426349 is an apocalyptic number.

It is an amenable number.

20426349 is a deficient number, since it is larger than the sum of its proper divisors (8640851).

20426349 is a wasteful number, since it uses less digits than its factorization.

20426349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 20426349 is about 4519.5518583152. The cubic root of 20426349 is about 273.3570312919.

The spelling of 20426349 in words is "twenty million, four hundred twenty-six thousand, three hundred forty-nine".