21760130 has 32 divisors (see below), whose sum is σ = 47122560. Its totient is φ = 7067520.

The previous prime is 21760127. The next prime is 21760133. The reversal of 21760130 is 3106712.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21760127) and next prime (21760133).

It is not an unprimeable number, because it can be changed into a prime (21760133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6851 + ... + 9510.

It is an arithmetic number, because the mean of its divisors is an integer number (1472580).

Almost surely, 2^21760130 is an apocalyptic number.

21760130 is an abundant number, since it is smaller than the sum of its proper divisors (25362430).

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

21760130 is a wasteful number, since it uses less digits than its factorization.

21760130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16394.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 21760130 is about 4664.7754501155. The cubic root of 21760130 is about 279.1818378429.

Adding to 21760130 its reverse (3106712), we get a palindrome (24866842).

The spelling of 21760130 in words is "twenty-one million, seven hundred sixty thousand, one hundred thirty".