21430635370 has 32 divisors (see below), whose sum is σ = 40851993600. Its totient is φ = 8066478336.

The previous prime is 21430635361. The next prime is 21430635379. The reversal of 21430635370 is 7353603412.

It is an interprime number because it is at equal distance from previous prime (21430635361) and next prime (21430635379).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (21430635379) 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, 1338271 + ... + 1354189.

It is an arithmetic number, because the mean of its divisors is an integer number (1276624800).

Almost surely, 2^21430635370 is an apocalyptic number.

21430635370 is a deficient number, since it is larger than the sum of its proper divisors (19421358230).

21430635370 is a wasteful number, since it uses less digits than its factorization.

21430635370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23862.

The product of its (nonzero) digits is 45360, while the sum is 34.

The spelling of 21430635370 in words is "twenty-one billion, four hundred thirty million, six hundred thirty-five thousand, three hundred seventy".