21430441958 has 32 divisors (see below), whose sum is σ = 34573245120. Its totient is φ = 9936622080.

The previous prime is 21430441957. The next prime is 21430441979. The reversal of 21430441958 is 85914403412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21430441957) 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, 455858 + ... + 500666.

It is an arithmetic number, because the mean of its divisors is an integer number (1080413910).

Almost surely, 2^21430441958 is an apocalyptic number.

21430441958 is a deficient number, since it is larger than the sum of its proper divisors (13142803162).

21430441958 is a wasteful number, since it uses less digits than its factorization.

21430441958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45152.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 21430441958 in words is "twenty-one billion, four hundred thirty million, four hundred forty-one thousand, nine hundred fifty-eight".