20124156 has 24 divisors (see below), whose sum is σ = 50568784. Its totient is φ = 6192000.

The previous prime is 20124127. The next prime is 20124179. The reversal of 20124156 is 65142102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64345 + ... + 64656.

Almost surely, 2^20124156 is an apocalyptic number.

20124156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20124156 is an abundant number, since it is smaller than the sum of its proper divisors (30444628).

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

20124156 is a wasteful number, since it uses less digits than its factorization.

20124156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129021 (or 129019 counting only the distinct ones).

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

The square root of 20124156 is about 4485.9955416830. The cubic root of 20124156 is about 272.0022887639.

Adding to 20124156 its reverse (65142102), we get a palindrome (85266258).

The spelling of 20124156 in words is "twenty million, one hundred twenty-four thousand, one hundred fifty-six".