26573243421 has 16 divisors (see below), whose sum is σ = 37299247040. Its totient is φ = 16781541120.

The previous prime is 26573243419. The next prime is 26573243423. The reversal of 26573243421 is 12434237562.

It is an interprime number because it is at equal distance from previous prime (26573243419) and next prime (26573243423).

It is not a de Polignac number, because 26573243421 - 2¹ = 26573243419 is a prime.

It is a super-2 number, since 2×26573243421² (a number of 22 digits) 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 26573243421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26573243423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1120341 + ... + 1143813.

It is an arithmetic number, because the mean of its divisors is an integer number (2331202940).

Almost surely, 2^26573243421 is an apocalyptic number.

It is an amenable number.

26573243421 is a deficient number, since it is larger than the sum of its proper divisors (10726003619).

26573243421 is a wasteful number, since it uses less digits than its factorization.

26573243421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43356.

The product of its digits is 241920, while the sum is 39.

The spelling of 26573243421 in words is "twenty-six billion, five hundred seventy-three million, two hundred forty-three thousand, four hundred twenty-one".