21158496001 has 8 divisors (see below), whose sum is σ = 21344425344. Its totient is φ = 20973360240.

The previous prime is 21158495947. The next prime is 21158496017. The reversal of 21158496001 is 10069485112.

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

It is a cyclic number.

It is not a de Polignac number, because 21158496001 - 2³³ = 12568561409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21158496031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144775 + ... + 251548.

It is an arithmetic number, because the mean of its divisors is an integer number (2668053168).

Almost surely, 2^21158496001 is an apocalyptic number.

It is an amenable number.

21158496001 is a deficient number, since it is larger than the sum of its proper divisors (185929343).

21158496001 is a wasteful number, since it uses less digits than its factorization.

21158496001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396791.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 21158496001 in words is "twenty-one billion, one hundred fifty-eight million, four hundred ninety-six thousand, one".