20851894119357 has 160 divisors (see below), whose sum is σ = 37826207096832. Its totient is φ = 11174907764736.

The previous prime is 20851894119319. The next prime is 20851894119379. The reversal of 20851894119357 is 75391149815802.

20851894119357 is a `hidden beast` number, since 2 + 0 + 8 + 5 + 1 + 89 + 411 + 93 + 57 = 666.

It is not a de Polignac number, because 20851894119357 - 2¹⁸ = 20851893857213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 20851894119294 and 20851894119303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20851894129357) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 5733265743 + ... + 5733269379.

Almost surely, 2^{20851894119357} is an apocalyptic number.

20851894119357 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20851894119357 is a deficient number, since it is larger than the sum of its proper divisors (16974312977475).

20851894119357 is a wasteful number, since it uses less digits than its factorization.

20851894119357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609 (or 5600 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 63.

The spelling of 20851894119357 in words is "twenty trillion, eight hundred fifty-one billion, eight hundred ninety-four million, one hundred nineteen thousand, three hundred fifty-seven".