21146070249409 has 8 divisors (see below), whose sum is σ = 24171379106688. Its totient is φ = 18121871811840.

The previous prime is 21146070249389. The next prime is 21146070249487. The reversal of 21146070249409 is 90494207064112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21146070249409 - 2¹⁷ = 21146070118337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21146070229409) 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, 277564117 + ... + 277640290.

It is an arithmetic number, because the mean of its divisors is an integer number (3021422388336).

Almost surely, 2^{21146070249409} is an apocalyptic number.

It is an amenable number.

21146070249409 is a deficient number, since it is larger than the sum of its proper divisors (3025308857279).

21146070249409 is an equidigital number, since it uses as much as digits as its factorization.

21146070249409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555209855.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 21146070249409 in words is "twenty-one trillion, one hundred forty-six billion, seventy million, two hundred forty-nine thousand, four hundred nine".