20429376 has 112 divisors (see below), whose sum is σ = 62544960. Its totient is φ = 5816320.

The previous prime is 20429363. The next prime is 20429377. The reversal of 20429376 is 67392402.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20429377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35620 + ... + 36188.

Almost surely, 2^20429376 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 20429376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31272480).

20429376 is an abundant number, since it is smaller than the sum of its proper divisors (42115584).

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

20429376 is a wasteful number, since it uses less digits than its factorization.

20429376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 20429376 is about 4519.8867242443. The cubic root of 20429376 is about 273.3705336374.

It can be divided in two parts, 204 and 29376, that multiplied together give a square (5992704 = 2448²).

The spelling of 20429376 in words is "twenty million, four hundred twenty-nine thousand, three hundred seventy-six".