21203323007 has 8 divisors (see below), whose sum is σ = 22130651520. Its totient is φ = 20276448280.

The previous prime is 21203323003. The next prime is 21203323013. The reversal of 21203323007 is 70032330212.

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 21203323007 - 2² = 21203323003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203323003) 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, 16169 + ... + 206562.

It is an arithmetic number, because the mean of its divisors is an integer number (2766331440).

Almost surely, 2^21203323007 is an apocalyptic number.

21203323007 is a deficient number, since it is larger than the sum of its proper divisors (927328513).

21203323007 is a wasteful number, since it uses less digits than its factorization.

21203323007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226893.

The product of its (nonzero) digits is 1512, while the sum is 23.

Adding to 21203323007 its reverse (70032330212), we get a palindrome (91235653219).

The spelling of 21203323007 in words is "twenty-one billion, two hundred three million, three hundred twenty-three thousand, seven".