29825621142 has 16 divisors (see below), whose sum is σ = 59653099632. Its totient is φ = 9941564160.

The previous prime is 29825621081. The next prime is 29825621159. The reversal of 29825621142 is 24112652892.

It is a super-2 number, since 2×29825621142² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 29825621094 and 29825621103.

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, 218238 + ... + 327534.

It is an arithmetic number, because the mean of its divisors is an integer number (3728318727).

Almost surely, 2^29825621142 is an apocalyptic number.

29825621142 is an abundant number, since it is smaller than the sum of its proper divisors (29827478490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29825621142 is a wasteful number, since it uses less digits than its factorization.

29825621142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154783.

The product of its digits is 138240, while the sum is 42.

The spelling of 29825621142 in words is "twenty-nine billion, eight hundred twenty-five million, six hundred twenty-one thousand, one hundred forty-two".