20400410410402 has 16 divisors (see below), whose sum is σ = 33384856648032. Its totient is φ = 9272256354720.

The previous prime is 20400410410337. The next prime is 20400410410409. The reversal of 20400410410402 is 20401401400402.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (20400410410409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32556003 + ... + 33176710.

It is an arithmetic number, because the mean of its divisors is an integer number (2086553540502).

Almost surely, 2^{20400410410402} is an apocalyptic number.

20400410410402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20400410410402 is a deficient number, since it is larger than the sum of its proper divisors (12984446237630).

20400410410402 is a wasteful number, since it uses less digits than its factorization.

20400410410402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65746833.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 20400410410402 its reverse (20401401400402), we get a palindrome (40801811810804).

The spelling of 20400410410402 in words is "twenty trillion, four hundred billion, four hundred ten million, four hundred ten thousand, four hundred two".