20699672 has 16 divisors (see below), whose sum is σ = 44356560. Its totient is φ = 8871264.

The previous prime is 20699671. The next prime is 20699713. The reversal of 20699672 is 27699602.

It is a happy number.

It is a super-3 number, since 3×20699672³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20699671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184763 + ... + 184874.

It is an arithmetic number, because the mean of its divisors is an integer number (2772285).

Almost surely, 2^20699672 is an apocalyptic number.

It is an amenable number.

20699672 is an abundant number, since it is smaller than the sum of its proper divisors (23656888).

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

20699672 is a wasteful number, since it uses less digits than its factorization.

20699672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369650 (or 369646 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 20699672 is about 4549.6892201556. The cubic root of 20699672 is about 274.5708877829.

The spelling of 20699672 in words is "twenty million, six hundred ninety-nine thousand, six hundred seventy-two".