20349426 has 16 divisors (see below), whose sum is σ = 40806144. Its totient is φ = 6765264.

The previous prime is 20349421. The next prime is 20349431. The reversal of 20349426 is 62494302.

It is an interprime number because it is at equal distance from previous prime (20349421) and next prime (20349431).

It is a junction number, because it is equal to n+sod(n) for n = 20349393 and 20349402.

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 7 ways as a sum of consecutive naturals, for example, 1890 + ... + 6653.

It is an arithmetic number, because the mean of its divisors is an integer number (2550384).

Almost surely, 2^20349426 is an apocalyptic number.

20349426 is an abundant number, since it is smaller than the sum of its proper divisors (20456718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20349426 is a wasteful number, since it uses less digits than its factorization.

20349426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8945.

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

The square root of 20349426 is about 4511.0338061247. The cubic root of 20349426 is about 273.0134571853.

The spelling of 20349426 in words is "twenty million, three hundred forty-nine thousand, four hundred twenty-six".