21620470341405 has 32 divisors (see below), whose sum is σ = 37255730593536. Its totient is φ = 10643353265664.

The previous prime is 21620470341347. The next prime is 21620470341439. The reversal of 21620470341405 is 50414307402612.

It is not a de Polignac number, because 21620470341405 - 2⁶ = 21620470341341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 686544 + ... + 6611526.

It is an arithmetic number, because the mean of its divisors is an integer number (1164241581048).

Almost surely, 2^{21620470341405} is an apocalyptic number.

It is an amenable number.

21620470341405 is a deficient number, since it is larger than the sum of its proper divisors (15635260252131).

21620470341405 is a wasteful number, since it uses less digits than its factorization.

21620470341405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5943717.

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 21620470341405 in words is "twenty-one trillion, six hundred twenty billion, four hundred seventy million, three hundred forty-one thousand, four hundred five".