20049380 has 48 divisors (see below), whose sum is σ = 46146240. Its totient is φ = 7271808.

The previous prime is 20049373. The next prime is 20049413. The reversal of 20049380 is 8394002.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14687 + ... + 15993.

It is an arithmetic number, because the mean of its divisors is an integer number (961380).

Almost surely, 2^20049380 is an apocalyptic number.

20049380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20049380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23073120).

20049380 is an abundant number, since it is smaller than the sum of its proper divisors (26096860).

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

20049380 is a wasteful number, since it uses less digits than its factorization.

20049380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388 (or 1386 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20049380 is about 4477.6534032906. The cubic root of 20049380 is about 271.6649746257.

The spelling of 20049380 in words is "twenty million, forty-nine thousand, three hundred eighty".