21276307007 has 32 divisors (see below), whose sum is σ = 23431472640. Its totient is φ = 19241671680.

The previous prime is 21276306979. The next prime is 21276307009. The reversal of 21276307007 is 70070367212.

It is not a de Polignac number, because 21276307007 - 2⁶ = 21276306943 is a prime.

It is a super-2 number, since 2×21276307007² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21276307009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9205382 + ... + 9207692.

It is an arithmetic number, because the mean of its divisors is an integer number (732233520).

Almost surely, 2^21276307007 is an apocalyptic number.

21276307007 is a deficient number, since it is larger than the sum of its proper divisors (2155165633).

21276307007 is a wasteful number, since it uses less digits than its factorization.

21276307007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591.

The product of its (nonzero) digits is 24696, while the sum is 35.

The spelling of 21276307007 in words is "twenty-one billion, two hundred seventy-six million, three hundred seven thousand, seven".