21050260 has 48 divisors (see below), whose sum is σ = 55117440. Its totient is φ = 6560640.

The previous prime is 21050251. The next prime is 21050269. The reversal of 21050260 is 6205012.

21050260 = T₂₆₀ + T₂₆₁ + ... + T₅₂₃.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21050251) and next prime (21050269).

It is a super-2 number, since 2×21050260² = 886226892135200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21050269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5295 + ... + 8374.

It is an arithmetic number, because the mean of its divisors is an integer number (1148280).

Almost surely, 2^21050260 is an apocalyptic number.

21050260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21050260 is an abundant number, since it is smaller than the sum of its proper divisors (34067180).

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

21050260 is a wasteful number, since it uses less digits than its factorization.

21050260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13696 (or 13694 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 21050260 is about 4588.0562333084. The cubic root of 21050260 is about 276.1123431195.

Adding to 21050260 its reverse (6205012), we get a palindrome (27255272).

The spelling of 21050260 in words is "twenty-one million, fifty thousand, two hundred sixty".