20541504 has 56 divisors (see below), whose sum is σ = 55046880. Its totient is φ = 6759424.

The previous prime is 20541497. The next prime is 20541511. The reversal of 20541504 is 40514502.

It is an interprime number because it is at equal distance from previous prime (20541497) and next prime (20541511).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15292 + ... + 16580.

It is an arithmetic number, because the mean of its divisors is an integer number (982980).

Almost surely, 2^20541504 is an apocalyptic number.

20541504 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 20541504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27523440).

20541504 is an abundant number, since it is smaller than the sum of its proper divisors (34505376).

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

20541504 is a wasteful number, since it uses less digits than its factorization.

20541504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 20541504 is about 4532.2736016265. The cubic root of 20541504 is about 273.8697589058.

The spelling of 20541504 in words is "twenty million, five hundred forty-one thousand, five hundred four".