20974086 has 32 divisors (see below), whose sum is σ = 53268480. Its totient is φ = 5992488.

The previous prime is 20974049. The next prime is 20974111. The reversal of 20974086 is 68047902.

It is a super-3 number, since 3×20974086³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20974086.

It is a congruent 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, 27366 + ... + 28121.

It is an arithmetic number, because the mean of its divisors is an integer number (1664640).

Almost surely, 2^20974086 is an apocalyptic number.

20974086 is an abundant number, since it is smaller than the sum of its proper divisors (32294394).

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

20974086 is a wasteful number, since it uses less digits than its factorization.

20974086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55505 (or 55499 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 20974086 is about 4579.7473729454. The cubic root of 20974086 is about 275.7788871786.

The spelling of 20974086 in words is "twenty million, nine hundred seventy-four thousand, eighty-six".