20477268 has 72 divisors (see below), whose sum is σ = 61746048. Its totient is φ = 5594688.

The previous prime is 20477263. The next prime is 20477287. The reversal of 20477268 is 86277402.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20477263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4030 + ... + 7562.

It is an arithmetic number, because the mean of its divisors is an integer number (857584).

Almost surely, 2^20477268 is an apocalyptic number.

20477268 is a gapful number since it is divisible by the number (28) 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 20477268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30873024).

20477268 is an abundant number, since it is smaller than the sum of its proper divisors (41268780).

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

20477268 is a wasteful number, since it uses less digits than its factorization.

20477268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3573 (or 3568 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 20477268 is about 4525.1815433196. The cubic root of 20477268 is about 273.5839851609.

The spelling of 20477268 in words is "twenty million, four hundred seventy-seven thousand, two hundred sixty-eight".