20061880 has 32 divisors (see below), whose sum is σ = 45372240. Its totient is φ = 7983360.

The previous prime is 20061871. The next prime is 20061883. The reversal of 20061880 is 8816002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20061883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7252 + ... + 9628.

Almost surely, 2^20061880 is an apocalyptic number.

20061880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20061880 is an abundant number, since it is smaller than the sum of its proper divisors (25310360).

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

20061880 is a wasteful number, since it uses less digits than its factorization.

20061880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599 (or 2595 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 20061880 is about 4479.0490062066. The cubic root of 20061880 is about 271.7214203730.

Adding to 20061880 its reverse (8816002), we get a palindrome (28877882).

The spelling of 20061880 in words is "twenty million, sixty-one thousand, eight hundred eighty".