22040400020402 has 8 divisors (see below), whose sum is σ = 33063532788636. Its totient is φ = 11019222424192.

The previous prime is 22040400020393. The next prime is 22040400020407. The reversal of 22040400020402 is 20402000404022.

It can be written as a sum of positive squares in 2 ways, for example, as 20051400338641 + 1988999681761 = 4477879^2 + 1410319^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×22040400020402³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22040400020407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488764823 + ... + 488809914.

Almost surely, 2^{22040400020402} is an apocalyptic number.

22040400020402 is a deficient number, since it is larger than the sum of its proper divisors (11023132768234).

22040400020402 is a wasteful number, since it uses less digits than its factorization.

22040400020402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977586012.

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 22040400020402 its reverse (20402000404022), we get a palindrome (42442400424424).

The spelling of 22040400020402 in words is "twenty-two trillion, forty billion, four hundred million, twenty thousand, four hundred two".