20420235567658 has 16 divisors (see below), whose sum is σ = 30639446843040. Its totient is φ = 10207086852976.

The previous prime is 20420235567649. The next prime is 20420235567659. The reversal of 20420235567658 is 85676553202402.

It is a junction number, because it is equal to n+sod(n) for n = 20420235567599 and 20420235567608.

It is not an unprimeable number, because it can be changed into a prime (20420235567659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254059785 + ... + 254140147.

It is an arithmetic number, because the mean of its divisors is an integer number (1914965427690).

Almost surely, 2^{20420235567658} is an apocalyptic number.

20420235567658 is a deficient number, since it is larger than the sum of its proper divisors (10219211275382).

20420235567658 is a wasteful number, since it uses less digits than its factorization.

20420235567658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116501.

The product of its (nonzero) digits is 24192000, while the sum is 55.

The spelling of 20420235567658 in words is "twenty trillion, four hundred twenty billion, two hundred thirty-five million, five hundred sixty-seven thousand, six hundred fifty-eight".