21150006242 has 16 divisors (see below), whose sum is σ = 32259955200. Its totient is φ = 10397799360.

The previous prime is 21150006239. The next prime is 21150006257. The reversal of 21150006242 is 24260005112.

It is a happy number.

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, 239642 + ... + 315797.

It is an arithmetic number, because the mean of its divisors is an integer number (2016247200).

Almost surely, 2^21150006242 is an apocalyptic number.

21150006242 is a deficient number, since it is larger than the sum of its proper divisors (11109948958).

21150006242 is a wasteful number, since it uses less digits than its factorization.

21150006242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555761.

The product of its (nonzero) digits is 960, while the sum is 23.

The spelling of 21150006242 in words is "twenty-one billion, one hundred fifty million, six thousand, two hundred forty-two".