20402002424402 has 16 divisors (see below), whose sum is σ = 31254368745600. Its totient is φ = 9983882806128.

The previous prime is 20402002424393. The next prime is 20402002424413. The reversal of 20402002424402 is 20442420020402.

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, 12812048 + ... + 14316164.

It is an arithmetic number, because the mean of its divisors is an integer number (1953398046600).

Almost surely, 2^{20402002424402} is an apocalyptic number.

20402002424402 is a deficient number, since it is larger than the sum of its proper divisors (10852366321198).

20402002424402 is a wasteful number, since it uses less digits than its factorization.

20402002424402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648465.

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 20402002424402 its reverse (20442420020402), we get a palindrome (40844422444804).

It can be divided in two parts, 2040200 and 2424402, that multiplied together give a square (4946264960400 = 2224020²).

The spelling of 20402002424402 in words is "twenty trillion, four hundred two billion, two million, four hundred twenty-four thousand, four hundred two".