21034992520435 has 4 divisors (see below), whose sum is σ = 25241991024528. Its totient is φ = 16827994016344.

The previous prime is 21034992520433. The next prime is 21034992520447. The reversal of 21034992520435 is 53402529943012.

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

It is a cyclic number.

It is not a de Polignac number, because 21034992520435 - 2¹ = 21034992520433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21034992520433) 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, 2103499252039 + ... + 2103499252048.

It is an arithmetic number, because the mean of its divisors is an integer number (6310497756132).

Almost surely, 2^{21034992520435} is an apocalyptic number.

21034992520435 is a deficient number, since it is larger than the sum of its proper divisors (4206998504093).

21034992520435 is an equidigital number, since it uses as much as digits as its factorization.

21034992520435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4206998504092.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 21034992520435 in words is "twenty-one trillion, thirty-four billion, nine hundred ninety-two million, five hundred twenty thousand, four hundred thirty-five".