20465788 has 24 divisors (see below), whose sum is σ = 41120352. Its totient is φ = 8730624.

The previous prime is 20465771. The next prime is 20465803. The reversal of 20465788 is 88756402.

It is a self number, because there is not a number n which added to its sum of digits gives 20465788.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4956 + ... + 8092.

It is an arithmetic number, because the mean of its divisors is an integer number (1713348).

Almost surely, 2^20465788 is an apocalyptic number.

20465788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20465788 is an abundant number, since it is smaller than the sum of its proper divisors (20654564).

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

20465788 is a wasteful number, since it uses less digits than its factorization.

20465788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3381 (or 3379 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 20465788 is about 4523.9129080918. The cubic root of 20465788 is about 273.5328499011.

The spelling of 20465788 in words is "twenty million, four hundred sixty-five thousand, seven hundred eighty-eight".