21038000207 has 24 divisors (see below), whose sum is σ = 25334402400. Its totient is φ = 17398562496.

The previous prime is 21038000197. The next prime is 21038000219. The reversal of 21038000207 is 70200083012.

It is a de Polignac number, because none of the positive numbers 2^k-21038000207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21038000227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2424158 + ... + 2432820.

It is an arithmetic number, because the mean of its divisors is an integer number (1055600100).

Almost surely, 2^21038000207 is an apocalyptic number.

21038000207 is a deficient number, since it is larger than the sum of its proper divisors (4296402193).

21038000207 is a wasteful number, since it uses less digits than its factorization.

21038000207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10415 (or 10408 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 21038000207 its reverse (70200083012), we get a palindrome (91238083219).

The spelling of 21038000207 in words is "twenty-one billion, thirty-eight million, two hundred seven", and thus it is an aban number.