21402102034 has 8 divisors (see below), whose sum is σ = 32155017840. Its totient is φ = 10683762756.

The previous prime is 21402101983. The next prime is 21402102041. The reversal of 21402102034 is 43020120412.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8642584 + ... + 8645059.

It is an arithmetic number, because the mean of its divisors is an integer number (4019377230).

Almost surely, 2^21402102034 is an apocalyptic number.

21402102034 is a deficient number, since it is larger than the sum of its proper divisors (10752915806).

21402102034 is a wasteful number, since it uses less digits than its factorization.

21402102034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17288264.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21402102034 its reverse (43020120412), we get a palindrome (64422222446).

The spelling of 21402102034 in words is "twenty-one billion, four hundred two million, one hundred two thousand, thirty-four".