20605412278 has 16 divisors (see below), whose sum is σ = 33794076096. Its totient is φ = 9344949640.

The previous prime is 20605412263. The next prime is 20605412297. The reversal of 20605412278 is 87221450602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1047376 + ... + 1066867.

It is an arithmetic number, because the mean of its divisors is an integer number (2112129756).

Almost surely, 2^20605412278 is an apocalyptic number.

20605412278 is a deficient number, since it is larger than the sum of its proper divisors (13188663818).

20605412278 is a wasteful number, since it uses less digits than its factorization.

20605412278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114699.

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 20605412278 in words is "twenty billion, six hundred five million, four hundred twelve thousand, two hundred seventy-eight".