20151426 has 32 divisors (see below), whose sum is σ = 44057088. Its totient is φ = 6117120.

The previous prime is 20151407. The next prime is 20151449. The reversal of 20151426 is 62415102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25 + ... + 6348.

It is an arithmetic number, because the mean of its divisors is an integer number (1376784).

Almost surely, 2^20151426 is an apocalyptic number.

20151426 is an abundant number, since it is smaller than the sum of its proper divisors (23905662).

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

20151426 is a wasteful number, since it uses less digits than its factorization.

20151426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6426.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20151426 is about 4489.0339718028. The cubic root of 20151426 is about 272.1250956447.

Adding to 20151426 its reverse (62415102), we get a palindrome (82566528).

The spelling of 20151426 in words is "twenty million, one hundred fifty-one thousand, four hundred twenty-six".