21030213497 has 8 divisors (see below), whose sum is σ = 21495086976. Its totient is φ = 20566066032.

The previous prime is 21030213481. The next prime is 21030213499. The reversal of 21030213497 is 79431203012.

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 21030213497 - 2⁴ = 21030213481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21030213499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122723 + ... + 239000.

It is an arithmetic number, because the mean of its divisors is an integer number (2686885872).

Almost surely, 2^21030213497 is an apocalyptic number.

It is an amenable number.

21030213497 is a deficient number, since it is larger than the sum of its proper divisors (464873479).

21030213497 is a wasteful number, since it uses less digits than its factorization.

21030213497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363007.

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 21030213497 in words is "twenty-one billion, thirty million, two hundred thirteen thousand, four hundred ninety-seven".