20345534661415 has 4 divisors (see below), whose sum is σ = 24414641593704. Its totient is φ = 16276427729128.

The previous prime is 20345534661377. The next prime is 20345534661481. The reversal of 20345534661415 is 51416643554302.

It is a happy number.

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 20345534661415 - 2⁹ = 20345534660903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2034553466137 + ... + 2034553466146.

It is an arithmetic number, because the mean of its divisors is an integer number (6103660398426).

Almost surely, 2^{20345534661415} is an apocalyptic number.

20345534661415 is a deficient number, since it is larger than the sum of its proper divisors (4069106932289).

20345534661415 is an equidigital number, since it uses as much as digits as its factorization.

20345534661415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069106932288.

The product of its (nonzero) digits is 5184000, while the sum is 49.

The spelling of 20345534661415 in words is "twenty trillion, three hundred forty-five billion, five hundred thirty-four million, six hundred sixty-one thousand, four hundred fifteen".