20387276 has 24 divisors (see below), whose sum is σ = 43911840. Its totient is φ = 8065152.

The previous prime is 20387249. The next prime is 20387287. The reversal of 20387276 is 67278302.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 27641 + ... + 28368.

It is an arithmetic number, because the mean of its divisors is an integer number (1829660).

Almost surely, 2^20387276 is an apocalyptic number.

20387276 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20387276 is an abundant number, since it is smaller than the sum of its proper divisors (23524564).

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

20387276 is a wasteful number, since it uses less digits than its factorization.

20387276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56033 (or 56031 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 20387276 is about 4515.2271260702. The cubic root of 20387276 is about 273.1826209928.

The spelling of 20387276 in words is "twenty million, three hundred eighty-seven thousand, two hundred seventy-six".