20156246 has 16 divisors (see below), whose sum is σ = 33073920. Its totient is φ = 9136680.

The previous prime is 20156243. The next prime is 20156281. The reversal of 20156246 is 64265102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20156243) 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, 8615 + ... + 10701.

It is an arithmetic number, because the mean of its divisors is an integer number (2067120).

Almost surely, 2^20156246 is an apocalyptic number.

20156246 is a deficient number, since it is larger than the sum of its proper divisors (12917674).

20156246 is a wasteful number, since it uses less digits than its factorization.

20156246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20156246 is about 4489.5708035401. The cubic root of 20156246 is about 272.1467903608.

It can be divided in two parts, 20156 and 246, that added together give a palindrome (20402).

The spelling of 20156246 in words is "twenty million, one hundred fifty-six thousand, two hundred forty-six".