20829238415 has 8 divisors (see below), whose sum is σ = 24996241008. Its totient is φ = 16662620800.

The previous prime is 20829238411. The next prime is 20829238421. The reversal of 20829238415 is 51483292802.

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

It is not a de Polignac number, because 20829238415 - 2² = 20829238411 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 (20829238411) 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, 40439 + ... + 208071.

It is an arithmetic number, because the mean of its divisors is an integer number (3124530126).

Almost surely, 2^20829238415 is an apocalyptic number.

20829238415 is a deficient number, since it is larger than the sum of its proper divisors (4167002593).

20829238415 is a wasteful number, since it uses less digits than its factorization.

20829238415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192489.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 20829238415 in words is "twenty billion, eight hundred twenty-nine million, two hundred thirty-eight thousand, four hundred fifteen".