20149712 has 20 divisors (see below), whose sum is σ = 42589536. Its totient is φ = 9158880.

The previous prime is 20149711. The next prime is 20149733. The reversal of 20149712 is 21794102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20149711) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 57068 + ... + 57419.

Almost surely, 2^20149712 is an apocalyptic number.

20149712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20149712 is an abundant number, since it is smaller than the sum of its proper divisors (22439824).

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

20149712 is a wasteful number, since it uses less digits than its factorization.

20149712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114506 (or 114500 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 20149712 is about 4488.8430580719. The cubic root of 20149712 is about 272.1173801338.

The spelling of 20149712 in words is "twenty million, one hundred forty-nine thousand, seven hundred twelve".