20675655 has 192 divisors, whose sum is σ = 52835328. Its totient is φ = 7464960.

The previous prime is 20675653. The next prime is 20675663. The reversal of 20675655 is 55657602.

It is not a de Polignac number, because 20675655 - 2¹ = 20675653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675653) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1216207 + ... + 1216223.

It is an arithmetic number, because the mean of its divisors is an integer number (275184).

Almost surely, 2^20675655 is an apocalyptic number.

20675655 is an abundant number, since it is smaller than the sum of its proper divisors (32159673).

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

20675655 is a wasteful number, since it uses less digits than its factorization.

20675655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 20675655 is about 4547.0490430608. The cubic root of 20675655 is about 274.4646554869.

The spelling of 20675655 in words is "twenty million, six hundred seventy-five thousand, six hundred fifty-five".