21151859002 has 8 divisors (see below), whose sum is σ = 31819224096. Its totient is φ = 10545450972.

The previous prime is 21151858979. The next prime is 21151859039. The reversal of 21151859002 is 20095815112.

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

It is a super-2 number, since 2×21151859002² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15238398 + ... + 15239785.

It is an arithmetic number, because the mean of its divisors is an integer number (3977403012).

Almost surely, 2^21151859002 is an apocalyptic number.

21151859002 is a deficient number, since it is larger than the sum of its proper divisors (10667365094).

21151859002 is a wasteful number, since it uses less digits than its factorization.

21151859002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30478532.

The product of its (nonzero) digits is 7200, while the sum is 34.

The spelling of 21151859002 in words is "twenty-one billion, one hundred fifty-one million, eight hundred fifty-nine thousand, two".