20994032 has 40 divisors (see below), whose sum is σ = 42988320. Its totient is φ = 9912320.

The previous prime is 20994023. The next prime is 20994041. The reversal of 20994032 is 23049902.

It is an interprime number because it is at equal distance from previous prime (20994023) and next prime (20994041).

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 20993986 and 20994004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32432 + ... + 33072.

It is an arithmetic number, because the mean of its divisors is an integer number (1074708).

Almost surely, 2^20994032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20994032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21494160).

20994032 is an abundant number, since it is smaller than the sum of its proper divisors (21994288).

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

20994032 is a wasteful number, since it uses less digits than its factorization.

20994032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20994032 is about 4581.9244865013. The cubic root of 20994032 is about 275.8662798294.

The spelling of 20994032 in words is "twenty million, nine hundred ninety-four thousand, thirty-two".