20873351421786 has 32 divisors (see below), whose sum is σ = 42655841464320. Its totient is φ = 6806405918576.

The previous prime is 20873351421779. The next prime is 20873351421869. The reversal of 20873351421786 is 68712415337802.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17575806 + ... + 18725801.

It is an arithmetic number, because the mean of its divisors is an integer number (1332995045760).

Almost surely, 2^{20873351421786} is an apocalyptic number.

20873351421786 is an abundant number, since it is smaller than the sum of its proper divisors (21782490042534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20873351421786 is a wasteful number, since it uses less digits than its factorization.

20873351421786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36303698.

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 20873351421786 in words is "twenty trillion, eight hundred seventy-three billion, three hundred fifty-one million, four hundred twenty-one thousand, seven hundred eighty-six".