20435955953402 has 48 divisors (see below), whose sum is σ = 34479607599360. Its totient is φ = 9072511029120.

The previous prime is 20435955953363. The next prime is 20435955953417.

It is a happy number.

20435955953402 is nontrivially palindromic in base 10.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 214721858 + ... + 214817010.

It is an arithmetic number, because the mean of its divisors is an integer number (718325158320).

Almost surely, 2^{20435955953402} is an apocalyptic number.

20435955953402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20435955953402 is a deficient number, since it is larger than the sum of its proper divisors (14043651645958).

20435955953402 is a wasteful number, since it uses less digits than its factorization.

20435955953402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115859 (or 115848 counting only the distinct ones).

The product of its (nonzero) digits is 29160000, while the sum is 56.

It can be divided in two parts, 2043595 and 5953402, that added together give a palindrome (7996997).

The spelling of 20435955953402 in words is "twenty trillion, four hundred thirty-five billion, nine hundred fifty-five million, nine hundred fifty-three thousand, four hundred two".