20873351421756 has 36 divisors (see below), whose sum is σ = 52771216850352. Its totient is φ = 6956725832064.

The previous prime is 20873351421697. The next prime is 20873351421757. The reversal of 20873351421756 is 65712415337802.

20873351421756 is a `hidden beast` number, since 2 + 0 + 8 + 7 + 33 + 514 + 21 + 75 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×20873351421756² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20873351421757) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43842240 + ... + 44315783.

It is an arithmetic number, because the mean of its divisors is an integer number (1465867134732).

Almost surely, 2^{20873351421756} is an apocalyptic number.

It is an amenable number.

20873351421756 is an abundant number, since it is smaller than the sum of its proper divisors (31897865428596).

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

20873351421756 is a wasteful number, since it uses less digits than its factorization.

20873351421756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88164610 (or 88164605 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 20873351421756 in words is "twenty trillion, eight hundred seventy-three billion, three hundred fifty-one million, four hundred twenty-one thousand, seven hundred fifty-six".