20679552 has 96 divisors (see below), whose sum is σ = 61659000. Its totient is φ = 6644736.

The previous prime is 20679551. The next prime is 20679563. The reversal of 20679552 is 25597602.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20679551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33099 + ... + 33717.

Almost surely, 2^20679552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20679552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30829500).

20679552 is an abundant number, since it is smaller than the sum of its proper divisors (40979448).

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

20679552 is a wasteful number, since it uses less digits than its factorization.

20679552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 20679552 is about 4547.4775425504. The cubic root of 20679552 is about 274.4818983355.

The spelling of 20679552 in words is "twenty million, six hundred seventy-nine thousand, five hundred fifty-two".