20049660 has 96 divisors (see below), whose sum is σ = 63141120. Its totient is φ = 5281344.

The previous prime is 20049649. The next prime is 20049709. The reversal of 20049660 is 6694002.

It is a super-2 number, since 2×20049660² = 803977732231200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57607 + ... + 57953.

It is an arithmetic number, because the mean of its divisors is an integer number (657720).

Almost surely, 2^20049660 is an apocalyptic number.

20049660 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 20049660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31570560).

20049660 is an abundant number, since it is smaller than the sum of its proper divisors (43091460).

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

20049660 is a wasteful number, since it uses less digits than its factorization.

20049660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20049660 is about 4477.6846695586. The cubic root of 20049660 is about 271.6662392673. Note that the first 3 decimals are identical.

It can be divided in two parts, 2004 and 9660, that added together give a square (11664 = 108²).

The spelling of 20049660 in words is "twenty million, forty-nine thousand, six hundred sixty".