20692908 has 72 divisors (see below), whose sum is σ = 55291600. Its totient is φ = 6765120.

The previous prime is 20692901. The next prime is 20692967. The reversal of 20692908 is 80929602.

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

It is not an unprimeable number, because it can be changed into a prime (20692901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59118 + ... + 59466.

Almost surely, 2^20692908 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 20692908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27645800).

20692908 is an abundant number, since it is smaller than the sum of its proper divisors (34598692).

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

20692908 is a wasteful number, since it uses less digits than its factorization.

20692908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 20692908 is about 4548.9458119437. The cubic root of 20692908 is about 274.5409774891.

The spelling of 20692908 in words is "twenty million, six hundred ninety-two thousand, nine hundred eight".