20858043652406 has 8 divisors (see below), whose sum is σ = 31292420119704. Its totient is φ = 10427236945840.

The previous prime is 20858043652357. The next prime is 20858043652429. The reversal of 20858043652406 is 60425634085802.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892425575 + ... + 892448946.

It is an arithmetic number, because the mean of its divisors is an integer number (3911552514963).

Almost surely, 2^{20858043652406} is an apocalyptic number.

20858043652406 is a deficient number, since it is larger than the sum of its proper divisors (10434376467298).

20858043652406 is a wasteful number, since it uses less digits than its factorization.

20858043652406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784880366.

The product of its (nonzero) digits is 11059200, while the sum is 53.

The spelling of 20858043652406 in words is "twenty trillion, eight hundred fifty-eight billion, forty-three million, six hundred fifty-two thousand, four hundred six".