21259143004 has 24 divisors (see below), whose sum is σ = 41099385600. Its totient is φ = 9540925680.

The previous prime is 21259142969. The next prime is 21259143047. The reversal of 21259143004 is 40034195212.

It is a super-2 number, since 2×21259143004² (a number of 21 digits) contains 22 as substring.

It is a congruent 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, 3054514 + ... + 3061465.

It is an arithmetic number, because the mean of its divisors is an integer number (1712474400).

Almost surely, 2^21259143004 is an apocalyptic number.

It is an amenable number.

21259143004 is a deficient number, since it is larger than the sum of its proper divisors (19840242596).

21259143004 is a wasteful number, since it uses less digits than its factorization.

21259143004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116073 (or 6116071 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 21259143004 in words is "twenty-one billion, two hundred fifty-nine million, one hundred forty-three thousand, four".