29798915421 has 16 divisors (see below), whose sum is σ = 43347322368. Its totient is φ = 18058513200.

The previous prime is 29798915401. The next prime is 29798915431. The reversal of 29798915421 is 12451989792.

It is not a de Polignac number, because 29798915421 - 2⁵ = 29798915389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29798915401) 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, 509056 + ... + 564566.

It is an arithmetic number, because the mean of its divisors is an integer number (2709207648).

Almost surely, 2^29798915421 is an apocalyptic number.

It is an amenable number.

29798915421 is a deficient number, since it is larger than the sum of its proper divisors (13548406947).

29798915421 is a wasteful number, since it uses less digits than its factorization.

29798915421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71792.

The product of its digits is 3265920, while the sum is 57.

The spelling of 29798915421 in words is "twenty-nine billion, seven hundred ninety-eight million, nine hundred fifteen thousand, four hundred twenty-one".