21288519002 has 4 divisors (see below), whose sum is σ = 31932778506. Its totient is φ = 10644259500.

The previous prime is 21288518869. The next prime is 21288519013. The reversal of 21288519002 is 20091588212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20693110201 + 595408801 = 143851^2 + 24401^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5322129749 + ... + 5322129752.

Almost surely, 2^21288519002 is an apocalyptic number.

21288519002 is a deficient number, since it is larger than the sum of its proper divisors (10644259504).

21288519002 is a wasteful number, since it uses less digits than its factorization.

21288519002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10644259503.

The product of its (nonzero) digits is 23040, while the sum is 38.

The spelling of 21288519002 in words is "twenty-one billion, two hundred eighty-eight million, five hundred nineteen thousand, two".