20261528 has 32 divisors (see below), whose sum is σ = 45308160. Its totient is φ = 8305440.

The previous prime is 20261519. The next prime is 20261567. The reversal of 20261528 is 82516202.

It is a junction number, because it is equal to n+sod(n) for n = 20261497 and 20261506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6578 + ... + 9153.

It is an arithmetic number, because the mean of its divisors is an integer number (1415880).

Almost surely, 2^20261528 is an apocalyptic number.

20261528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20261528 is an abundant number, since it is smaller than the sum of its proper divisors (25046632).

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

20261528 is a wasteful number, since it uses less digits than its factorization.

20261528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15767 (or 15763 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20261528 is about 4501.2807066434. The cubic root of 20261528 is about 272.6198019924.

The spelling of 20261528 in words is "twenty million, two hundred sixty-one thousand, five hundred twenty-eight".