20261180 has 24 divisors (see below), whose sum is σ = 42836640. Its totient is φ = 8049600.

The previous prime is 20261179. The next prime is 20261191. The reversal of 20261180 is 8116202.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent 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, 335 + ... + 6374.

It is an arithmetic number, because the mean of its divisors is an integer number (1784860).

Almost surely, 2^20261180 is an apocalyptic number.

20261180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20261180 is an abundant number, since it is smaller than the sum of its proper divisors (22575460).

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

20261180 is a wasteful number, since it uses less digits than its factorization.

20261180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6869 (or 6867 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 20261180 is about 4501.2420508122. The cubic root of 20261180 is about 272.6182411981.

Adding to 20261180 its reverse (8116202), we get a palindrome (28377382).

The spelling of 20261180 in words is "twenty million, two hundred sixty-one thousand, one hundred eighty".