29800257021 has 8 divisors (see below), whose sum is σ = 44148528960. Its totient is φ = 19866837996.

The previous prime is 29800257013. The next prime is 29800257043. The reversal of 29800257021 is 12075200892.

29800257021 is a `hidden beast` number, since 2 + 9 + 80 + 0 + 2 + 570 + 2 + 1 = 666.

It is not a de Polignac number, because 29800257021 - 2³ = 29800257013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29800250021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551856585 + ... + 551856638.

It is an arithmetic number, because the mean of its divisors is an integer number (5518566120).

Almost surely, 2^29800257021 is an apocalyptic number.

It is an amenable number.

29800257021 is a deficient number, since it is larger than the sum of its proper divisors (14348271939).

29800257021 is a wasteful number, since it uses less digits than its factorization.

29800257021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103713232 (or 1103713226 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 29800257021 in words is "twenty-nine billion, eight hundred million, two hundred fifty-seven thousand, twenty-one".