21270950207 has 16 divisors (see below), whose sum is σ = 22992657408. Its totient is φ = 19561578240.

The previous prime is 21270950191. The next prime is 21270950231. The reversal of 21270950207 is 70205907212.

It is a cyclic number.

It is not a de Polignac number, because 21270950207 - 2⁴ = 21270950191 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 (21270950257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5938157 + ... + 5941737.

It is an arithmetic number, because the mean of its divisors is an integer number (1437041088).

Almost surely, 2^21270950207 is an apocalyptic number.

21270950207 is a deficient number, since it is larger than the sum of its proper divisors (1721707201).

21270950207 is a wasteful number, since it uses less digits than its factorization.

21270950207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5170.

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 21270950207 in words is "twenty-one billion, two hundred seventy million, nine hundred fifty thousand, two hundred seven".