20147544 has 48 divisors (see below), whose sum is σ = 54774720. Its totient is φ = 6690240.

The previous prime is 20147539. The next prime is 20147549. The reversal of 20147544 is 44574102.

It is an interprime number because it is at equal distance from previous prime (20147539) and next prime (20147549).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20147549) 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 11 ways as a sum of consecutive naturals, for example, 32889 + ... + 33495.

It is an arithmetic number, because the mean of its divisors is an integer number (1141140).

Almost surely, 2^20147544 is an apocalyptic number.

20147544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20147544 is an abundant number, since it is smaller than the sum of its proper divisors (34627176).

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

20147544 is a wasteful number, since it uses less digits than its factorization.

20147544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 20147544 is about 4488.6015639618. The cubic root of 20147544 is about 272.1076203311.

The spelling of 20147544 in words is "twenty million, one hundred forty-seven thousand, five hundred forty-four".