26920531 has 4 divisors (see below), whose sum is σ = 29367864. Its totient is φ = 24473200.

The previous prime is 26920513. The next prime is 26920577. The reversal of 26920531 is 13502962.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26920531 - 2¹³ = 26912339 is a prime.

It is a super-2 number, since 2×26920531² = 1449429978643922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26920531.

It is not an unprimeable number, because it can be changed into a prime (26920031) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1223650 + ... + 1223671.

It is an arithmetic number, because the mean of its divisors is an integer number (7341966).

Almost surely, 2^26920531 is an apocalyptic number.

26920531 is a deficient number, since it is larger than the sum of its proper divisors (2447333).

26920531 is a wasteful number, since it uses less digits than its factorization.

26920531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447332.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 26920531 is about 5188.4998795413. The cubic root of 26920531 is about 299.7053811308.

Subtracting from 26920531 its reverse (13502962), we obtain a square (13417569 = 3663²).

The spelling of 26920531 in words is "twenty-six million, nine hundred twenty thousand, five hundred thirty-one".