20526375440 has 40 divisors (see below), whose sum is σ = 48196354968. Its totient is φ = 8129254400.

The previous prime is 20526375427. The next prime is 20526375449. The reversal of 20526375440 is 4457362502.

It can be written as a sum of positive squares in 4 ways, for example, as 13758351616 + 6768023824 = 117296^2 + 82268^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 20526375394 and 20526375403.

It is not an unprimeable number, because it can be changed into a prime (20526375449) 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, 1262117 + ... + 1278276.

Almost surely, 2^20526375440 is an apocalyptic number.

20526375440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20526375440 is an abundant number, since it is smaller than the sum of its proper divisors (27669979528).

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

20526375440 is a wasteful number, since it uses less digits than its factorization.

20526375440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540507 (or 2540501 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 38.

The spelling of 20526375440 in words is "twenty billion, five hundred twenty-six million, three hundred seventy-five thousand, four hundred forty".