21140525140292 has 12 divisors (see below), whose sum is σ = 36995956791276. Its totient is φ = 10570251771360.

The previous prime is 21140525140291. The next prime is 21140525140313. The reversal of 21140525140292 is 29204152504112.

It can be written as a sum of positive squares in 2 ways, for example, as 10308633018436 + 10831892121856 = 3210706^2 + 3291184^2 .

It is not an unprimeable number, because it can be changed into a prime (21140525140291) 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, 3079838 + ... + 7194890.

It is an arithmetic number, because the mean of its divisors is an integer number (3082996399273).

Almost surely, 2^{21140525140292} is an apocalyptic number.

It is an amenable number.

21140525140292 is a deficient number, since it is larger than the sum of its proper divisors (15855431650984).

21140525140292 is a wasteful number, since it uses less digits than its factorization.

21140525140292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5399398 (or 5399396 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 21140525140292 in words is "twenty-one trillion, one hundred forty billion, five hundred twenty-five million, one hundred forty thousand, two hundred ninety-two".