21142487001 has 16 divisors (see below), whose sum is σ = 28242743040. Its totient is φ = 14068639440.

The previous prime is 21142486999. The next prime is 21142487017. The reversal of 21142487001 is 10078424112.

It is not a de Polignac number, because 21142487001 - 2¹ = 21142486999 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21142487001.

It is not an unprimeable number, because it can be changed into a prime (21142487021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4713906 + ... + 4718388.

It is an arithmetic number, because the mean of its divisors is an integer number (1765171440).

Almost surely, 2^21142487001 is an apocalyptic number.

It is an amenable number.

21142487001 is a deficient number, since it is larger than the sum of its proper divisors (7100256039).

21142487001 is a wasteful number, since it uses less digits than its factorization.

21142487001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7076.

The product of its (nonzero) digits is 3584, while the sum is 30.

The spelling of 21142487001 in words is "twenty-one billion, one hundred forty-two million, four hundred eighty-seven thousand, one".