20668590123435 has 32 divisors (see below), whose sum is σ = 36744705600000. Its totient is φ = 11023084451808.

The previous prime is 20668590123431. The next prime is 20668590123479. The reversal of 20668590123435 is 53432109586602.

It is a happy number.

20668590123435 is a `hidden beast` number, since 2 + 0 + 6 + 6 + 8 + 590 + 1 + 2 + 3 + 43 + 5 = 666.

It is not a de Polignac number, because 20668590123435 - 2² = 20668590123431 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20668590123431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8280906 + ... + 10483824.

It is an arithmetic number, because the mean of its divisors is an integer number (1148272050000).

Almost surely, 2^{20668590123435} is an apocalyptic number.

20668590123435 is a deficient number, since it is larger than the sum of its proper divisors (16076115476565).

20668590123435 is a wasteful number, since it uses less digits than its factorization.

20668590123435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272432 (or 2272426 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 20668590123435 in words is "twenty trillion, six hundred sixty-eight billion, five hundred ninety million, one hundred twenty-three thousand, four hundred thirty-five".