20061920 has 24 divisors (see below), whose sum is σ = 47396664. Its totient is φ = 8024704.

The previous prime is 20061917. The next prime is 20061941. The reversal of 20061920 is 2916002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20061892 and 20061901.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 62534 + ... + 62853.

It is an arithmetic number, because the mean of its divisors is an integer number (1974861).

Almost surely, 2^20061920 is an apocalyptic number.

20061920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20061920 is an abundant number, since it is smaller than the sum of its proper divisors (27334744).

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

20061920 is a wasteful number, since it uses less digits than its factorization.

20061920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125402 (or 125394 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 20061920 is about 4479.0534714379. The cubic root of 20061920 is about 271.7216009617.

Adding to 20061920 its reverse (2916002), we get a palindrome (22977922).

The spelling of 20061920 in words is "twenty million, sixty-one thousand, nine hundred twenty".