20888029350 has 72 divisors (see below), whose sum is σ = 56281319640. Its totient is φ = 5554047360.

The previous prime is 20888029291. The next prime is 20888029367. The reversal of 20888029350 is 5392088802.

It is a super-2 number, since 2×20888029350² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 20888029296 and 20888029305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 89266 + ... + 223034.

It is an arithmetic number, because the mean of its divisors is an integer number (781684995).

Almost surely, 2^20888029350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20888029350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28140659820).

20888029350 is an abundant number, since it is smaller than the sum of its proper divisors (35393290290).

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

20888029350 is a wasteful number, since it uses less digits than its factorization.

20888029350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134134 (or 134126 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 20888029350 in words is "twenty billion, eight hundred eighty-eight million, twenty-nine thousand, three hundred fifty".