20434880947311 has 28 divisors (see below), whose sum is σ = 30638702426472. Its totient is φ = 13623077574576.

The previous prime is 20434880947277. The next prime is 20434880947333. The reversal of 20434880947311 is 11374908843402.

20434880947311 is a `hidden beast` number, since 2 + 0 + 4 + 3 + 488 + 0 + 94 + 73 + 1 + 1 = 666.

It is not a de Polignac number, because 20434880947311 - 2¹⁰ = 20434880946287 is a prime.

It is a super-2 number, since 2×20434880947311² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434880547311) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 81133705 + ... + 81385181.

It is an arithmetic number, because the mean of its divisors is an integer number (1094239372374).

Almost surely, 2^{20434880947311} is an apocalyptic number.

20434880947311 is a deficient number, since it is larger than the sum of its proper divisors (10203821479161).

20434880947311 is an equidigital number, since it uses as much as digits as its factorization.

20434880947311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362962 (or 362947 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 20434880947311 in words is "twenty trillion, four hundred thirty-four billion, eight hundred eighty million, nine hundred forty-seven thousand, three hundred eleven".