20548920 has 128 divisors (see below), whose sum is σ = 74649600. Its totient is φ = 4417536.

The previous prime is 20548919. The next prime is 20548951. The reversal of 20548920 is 2984502.

It is a super-2 number, since 2×20548920² = 844516226332800, 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 an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13561 + ... + 14999.

It is an arithmetic number, because the mean of its divisors is an integer number (583200).

Almost surely, 2^20548920 is an apocalyptic number.

20548920 is a gapful number since it is divisible by the number (20) 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 20548920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37324800).

20548920 is an abundant number, since it is smaller than the sum of its proper divisors (54100680).

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

20548920 is a wasteful number, since it uses less digits than its factorization.

20548920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477 (or 1473 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 20548920 is about 4533.0916602248. The cubic root of 20548920 is about 273.9027128992.

The spelling of 20548920 in words is "twenty million, five hundred forty-eight thousand, nine hundred twenty".