21941503798 has 16 divisors (see below), whose sum is σ = 36363414240. Its totient is φ = 9876482176.

The previous prime is 21941503769. The next prime is 21941503817. The reversal of 21941503798 is 89730514912.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14028313 + ... + 14029876.

It is an arithmetic number, because the mean of its divisors is an integer number (2272713390).

Almost surely, 2^21941503798 is an apocalyptic number.

21941503798 is a deficient number, since it is larger than the sum of its proper divisors (14421910442).

21941503798 is a wasteful number, since it uses less digits than its factorization.

21941503798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28058231.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 21941503798 in words is "twenty-one billion, nine hundred forty-one million, five hundred three thousand, seven hundred ninety-eight".