20273880 has 64 divisors (see below), whose sum is σ = 66355200. Its totient is φ = 4914560.

The previous prime is 20273863. The next prime is 20273887. The reversal of 20273880 is 8837202.

It is a super-2 number, since 2×20273880² = 822060420508800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20273887) 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 15 ways as a sum of consecutive naturals, for example, 6360 + ... + 8999.

It is an arithmetic number, because the mean of its divisors is an integer number (1036800).

Almost surely, 2^20273880 is an apocalyptic number.

20273880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20273880 is an abundant number, since it is smaller than the sum of its proper divisors (46081320).

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

20273880 is a wasteful number, since it uses less digits than its factorization.

20273880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15384 (or 15380 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 20273880 is about 4502.6525515523. The cubic root of 20273880 is about 272.6751896502.

The spelling of 20273880 in words is "twenty million, two hundred seventy-three thousand, eight hundred eighty".