21402413042 has 16 divisors (see below), whose sum is σ = 32794813440. Its totient is φ = 10471863792.

The previous prime is 21402413023. The next prime is 21402413063. The reversal of 21402413042 is 24031420412.

It is a junction number, because it is equal to n+sod(n) for n = 21402412999 and 21402413017.

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, 222992 + ... + 304187.

It is an arithmetic number, because the mean of its divisors is an integer number (2049675840).

Almost surely, 2^21402413042 is an apocalyptic number.

21402413042 is a deficient number, since it is larger than the sum of its proper divisors (11392400398).

21402413042 is a wasteful number, since it uses less digits than its factorization.

21402413042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527617.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21402413042 its reverse (24031420412), we get a palindrome (45433833454).

The spelling of 21402413042 in words is "twenty-one billion, four hundred two million, four hundred thirteen thousand, forty-two".