21143000242 has 16 divisors (see below), whose sum is σ = 39033231552. Its totient is φ = 8364263760.

The previous prime is 21143000239. The next prime is 21143000251. The reversal of 21143000242 is 24200034112.

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, 58084984 + ... + 58085347.

It is an arithmetic number, because the mean of its divisors is an integer number (2439576972).

Almost surely, 2^21143000242 is an apocalyptic number.

21143000242 is a deficient number, since it is larger than the sum of its proper divisors (17890231310).

21143000242 is a wasteful number, since it uses less digits than its factorization.

21143000242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116170353.

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

Adding to 21143000242 its reverse (24200034112), we get a palindrome (45343034354).

The spelling of 21143000242 in words is "twenty-one billion, one hundred forty-three million, two hundred forty-two", and thus it is an aban number.