21407261867070 has 64 divisors (see below), whose sum is σ = 52225542270720. Its totient is φ = 5615090408448.

The previous prime is 21407261867063. The next prime is 21407261867077. The reversal of 21407261867070 is 7076816270412.

It is an interprime number because it is at equal distance from previous prime (21407261867063) and next prime (21407261867077).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21407261867077) 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, 22091460 + ... + 23040119.

It is an arithmetic number, because the mean of its divisors is an integer number (816024097980).

Almost surely, 2^{21407261867070} is an apocalyptic number.

21407261867070 is an abundant number, since it is smaller than the sum of its proper divisors (30818280403650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21407261867070 is a wasteful number, since it uses less digits than its factorization.

21407261867070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45131849.

The product of its (nonzero) digits is 1580544, while the sum is 51.

The spelling of 21407261867070 in words is "twenty-one trillion, four hundred seven billion, two hundred sixty-one million, eight hundred sixty-seven thousand, seventy".