21377875003 has 4 divisors (see below), whose sum is σ = 22635397080. Its totient is φ = 20120352928.

The previous prime is 21377874983. The next prime is 21377875031. The reversal of 21377875003 is 30057877312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21377875003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21377875033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628761013 + ... + 628761046.

It is an arithmetic number, because the mean of its divisors is an integer number (5658849270).

Almost surely, 2^21377875003 is an apocalyptic number.

21377875003 is a deficient number, since it is larger than the sum of its proper divisors (1257522077).

21377875003 is a wasteful number, since it uses less digits than its factorization.

21377875003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257522076.

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 21377875003 in words is "twenty-one billion, three hundred seventy-seven million, eight hundred seventy-five thousand, three".