26820532531 has 4 divisors (see below), whose sum is σ = 28883650432. Its totient is φ = 24757414632.

The previous prime is 26820532513. The next prime is 26820532537. The reversal of 26820532531 is 13523502862.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26820532531 is a prime.

It is a super-2 number, since 2×26820532531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26820532537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1031558931 + ... + 1031558956.

It is an arithmetic number, because the mean of its divisors is an integer number (7220912608).

Almost surely, 2^26820532531 is an apocalyptic number.

26820532531 is a deficient number, since it is larger than the sum of its proper divisors (2063117901).

26820532531 is a wasteful number, since it uses less digits than its factorization.

26820532531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063117900.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 26820532531 in words is "twenty-six billion, eight hundred twenty million, five hundred thirty-two thousand, five hundred thirty-one".