20270544 has 160 divisors (see below), whose sum is σ = 64948224. Its totient is φ = 5322240.

The previous prime is 20270533. The next prime is 20270557. The reversal of 20270544 is 44507202.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 332274 + ... + 332334.

Almost surely, 2^20270544 is an apocalyptic number.

20270544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20270544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32474112).

20270544 is an abundant number, since it is smaller than the sum of its proper divisors (44677680).

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

20270544 is a wasteful number, since it uses less digits than its factorization.

20270544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 20270544 is about 4502.2820880083. The cubic root of 20270544 is about 272.6602328958.

Adding to 20270544 its reverse (44507202), we get a palindrome (64777746).

The spelling of 20270544 in words is "twenty million, two hundred seventy thousand, five hundred forty-four".