20261545 has 8 divisors (see below), whose sum is σ = 24607296. Its totient is φ = 16013616.

The previous prime is 20261519. The next prime is 20261567. The reversal of 20261545 is 54516202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20261545 - 2¹¹ = 20259497 is a prime.

It is a Duffinian number.

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, 23997 + ... + 24826.

It is an arithmetic number, because the mean of its divisors is an integer number (3075912).

Almost surely, 2^20261545 is an apocalyptic number.

It is an amenable number.

20261545 is a deficient number, since it is larger than the sum of its proper divisors (4345751).

20261545 is an equidigital number, since it uses as much as digits as its factorization.

20261545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48911.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 20261545 is about 4501.2825949945. The cubic root of 20261545 is about 272.6198782377.

Adding to 20261545 its reverse (54516202), we get a palindrome (74777747).

The spelling of 20261545 in words is "twenty million, two hundred sixty-one thousand, five hundred forty-five".