21402330042 has 8 divisors (see below), whose sum is σ = 42804660096. Its totient is φ = 7134110012.

The previous prime is 21402330041. The next prime is 21402330043. The reversal of 21402330042 is 24003320412.

It is an interprime number because it is at equal distance from previous prime (21402330041) and next prime (21402330043).

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

21402330042 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21402330041) 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, 1783527498 + ... + 1783527509.

It is an arithmetic number, because the mean of its divisors is an integer number (5350582512).

Almost surely, 2^21402330042 is an apocalyptic number.

21402330042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21402330042 is a wasteful number, since it uses less digits than its factorization.

21402330042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567055012.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21402330042 its reverse (24003320412), we get a palindrome (45405650454).

The spelling of 21402330042 in words is "twenty-one billion, four hundred two million, three hundred thirty thousand, forty-two".