20621276 has 12 divisors (see below), whose sum is σ = 38863272. Its totient is φ = 9517488.

The previous prime is 20621273. The next prime is 20621281. The reversal of 20621276 is 67212602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20621273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198230 + ... + 198333.

It is an arithmetic number, because the mean of its divisors is an integer number (3238606).

Almost surely, 2^20621276 is an apocalyptic number.

20621276 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20621276 is a deficient number, since it is larger than the sum of its proper divisors (18241996).

20621276 is a wasteful number, since it uses less digits than its factorization.

20621276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396580 (or 396578 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20621276 is about 4541.0655137313. The cubic root of 20621276 is about 274.2238212386.

Adding to 20621276 its reverse (67212602), we get a palindrome (87833878).

The spelling of 20621276 in words is "twenty million, six hundred twenty-one thousand, two hundred seventy-six".