20299829634 has 256 divisors, whose sum is σ = 56832000000. Its totient is φ = 5240401920.

The previous prime is 20299829617. The next prime is 20299829639. The reversal of 20299829634 is 43692899202.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (20299829639) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 16252242 + ... + 16253490.

It is an arithmetic number, because the mean of its divisors is an integer number (222000000).

Almost surely, 2^20299829634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20299829634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28416000000).

20299829634 is an abundant number, since it is smaller than the sum of its proper divisors (36532170366).

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

20299829634 is a wasteful number, since it uses less digits than its factorization.

20299829634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390 (or 1384 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 20299829634 in words is "twenty billion, two hundred ninety-nine million, eight hundred twenty-nine thousand, six hundred thirty-four".