20299136 has 64 divisors (see below), whose sum is σ = 47552400. Its totient is φ = 8509440.

The previous prime is 20299117. The next prime is 20299151. The reversal of 20299136 is 63199202.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 17750 + ... + 18858.

Almost surely, 2^20299136 is an apocalyptic number.

20299136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20299136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23776200).

20299136 is an abundant number, since it is smaller than the sum of its proper divisors (27253264).

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

20299136 is a wasteful number, since it uses less digits than its factorization.

20299136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 20299136 is about 4505.4562477068. The cubic root of 20299136 is about 272.7883702039.

The spelling of 20299136 in words is "twenty million, two hundred ninety-nine thousand, one hundred thirty-six".