20527290 has 64 divisors (see below), whose sum is σ = 62565120. Its totient is φ = 4691520.

The previous prime is 20527289. The next prime is 20527319. The reversal of 20527290 is 9272502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3541 + ... + 7320.

It is an arithmetic number, because the mean of its divisors is an integer number (977580).

Almost surely, 2^20527290 is an apocalyptic number.

20527290 is an abundant number, since it is smaller than the sum of its proper divisors (42037830).

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

20527290 is a wasteful number, since it uses less digits than its factorization.

20527290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10884 (or 10878 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20527290 is about 4530.7052431161. The cubic root of 20527290 is about 273.8065749087.

Adding to 20527290 its reverse (9272502), we get a palindrome (29799792).

It can be divided in two parts, 205 and 27290, that added together give a triangular number (27495 = T₂₃₄).

The spelling of 20527290 in words is "twenty million, five hundred twenty-seven thousand, two hundred ninety".