20719380 has 48 divisors (see below), whose sum is σ = 63290304. Its totient is φ = 5022720.

The previous prime is 20719357. The next prime is 20719381. The reversal of 20719380 is 8391702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20719381) 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 15 ways as a sum of consecutive naturals, for example, 15037 + ... + 16356.

It is an arithmetic number, because the mean of its divisors is an integer number (1318548).

Almost surely, 2^20719380 is an apocalyptic number.

20719380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20719380 is an abundant number, since it is smaller than the sum of its proper divisors (42570924).

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

20719380 is a wasteful number, since it uses less digits than its factorization.

20719380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31416 (or 31414 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 20719380 is about 4551.8545670968. The cubic root of 20719380 is about 274.6579990928.

It can be divided in two parts, 20 and 719380, that added together give a triangular number (719400 = T₁₁₉₉).

The spelling of 20719380 in words is "twenty million, seven hundred nineteen thousand, three hundred eighty".