21070543407 has 32 divisors (see below), whose sum is σ = 28848960000. Its totient is φ = 13675697280.

The previous prime is 21070543397. The next prime is 21070543451. The reversal of 21070543407 is 70434507012.

It is not a de Polignac number, because 21070543407 - 2¹⁶ = 21070477871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21070543007) 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 31 ways as a sum of consecutive naturals, for example, 5679069 + ... + 5682777.

It is an arithmetic number, because the mean of its divisors is an integer number (901530000).

Almost surely, 2^21070543407 is an apocalyptic number.

21070543407 is a deficient number, since it is larger than the sum of its proper divisors (7778416593).

21070543407 is a wasteful number, since it uses less digits than its factorization.

21070543407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111.

The product of its (nonzero) digits is 23520, while the sum is 33.

The spelling of 21070543407 in words is "twenty-one billion, seventy million, five hundred forty-three thousand, four hundred seven".