21400430022 has 12 divisors (see below), whose sum is σ = 46367598420. Its totient is φ = 7133476668.

The previous prime is 21400429949. The next prime is 21400430083. The reversal of 21400430022 is 22003400412.

21400430022 is a `hidden beast` number, since 214 + 0 + 0 + 430 + 0 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1188912779 = 21400430022 / (2 + 1 + 4 + 0 + 0 + 4 + 3 + 0 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21400429977 and 21400430004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 594456372 + ... + 594456407.

It is an arithmetic number, because the mean of its divisors is an integer number (3863966535).

Almost surely, 2^21400430022 is an apocalyptic number.

21400430022 is an abundant number, since it is smaller than the sum of its proper divisors (24967168398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21400430022 is a wasteful number, since it uses less digits than its factorization.

21400430022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188912787 (or 1188912784 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 21400430022 its reverse (22003400412), we get a palindrome (43403830434).

The spelling of 21400430022 in words is "twenty-one billion, four hundred million, four hundred thirty thousand, twenty-two".