21526344362512 has 40 divisors (see below), whose sum is σ = 48175268005152. Its totient is φ = 9209131276800.

The previous prime is 21526344362447. The next prime is 21526344362513.

It is a happy number.

21526344362512 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21526344362512² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21526344362513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3597313914 + ... + 3597319897.

Almost surely, 2^{21526344362512} is an apocalyptic number.

21526344362512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21526344362512 is an abundant number, since it is smaller than the sum of its proper divisors (26648923642640).

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

21526344362512 is a wasteful number, since it uses less digits than its factorization.

21526344362512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7194633847 (or 7194633841 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 46.

The spelling of 21526344362512 in words is "twenty-one trillion, five hundred twenty-six billion, three hundred forty-four million, three hundred sixty-two thousand, five hundred twelve".