21630037740407 has 4 divisors (see below), whose sum is σ = 21630266581440. Its totient is φ = 21629808899376.

The previous prime is 21630037740391. The next prime is 21630037740439. The reversal of 21630037740407 is 70404773003612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21630037740407 - 2⁴ = 21630037740391 is a prime.

It is a super-3 number, since 3×21630037740407³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21630037743407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114278678 + ... + 114467795.

It is an arithmetic number, because the mean of its divisors is an integer number (5407566645360).

Almost surely, 2^{21630037740407} is an apocalyptic number.

21630037740407 is a deficient number, since it is larger than the sum of its proper divisors (228841033).

21630037740407 is an equidigital number, since it uses as much as digits as its factorization.

21630037740407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228841032.

The product of its (nonzero) digits is 592704, while the sum is 44.

The spelling of 21630037740407 in words is "twenty-one trillion, six hundred thirty billion, thirty-seven million, seven hundred forty thousand, four hundred seven".