21620470341407 has 8 divisors (see below), whose sum is σ = 26009588380800. Its totient is φ = 17556472156824.

The previous prime is 21620470341347. The next prime is 21620470341439. The reversal of 21620470341407 is 70414307402612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21620470341407 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 (21620470341607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81279963557 + ... + 81279963822.

It is an arithmetic number, because the mean of its divisors is an integer number (3251198547600).

Almost surely, 2^{21620470341407} is an apocalyptic number.

21620470341407 is a deficient number, since it is larger than the sum of its proper divisors (4389118039393).

21620470341407 is a wasteful number, since it uses less digits than its factorization.

21620470341407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162559927405.

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 21620470341407 in words is "twenty-one trillion, six hundred twenty billion, four hundred seventy million, three hundred forty-one thousand, four hundred seven".