20439762 has 48 divisors (see below), whose sum is σ = 48864960. Its totient is φ = 5679072.

The previous prime is 20439739. The next prime is 20439767. The reversal of 20439762 is 26793402.

It is not an unprimeable number, because it can be changed into a prime (20439767) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9939 + ... + 11817.

It is an arithmetic number, because the mean of its divisors is an integer number (1018020).

Almost surely, 2^20439762 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20439762, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24432480).

20439762 is an abundant number, since it is smaller than the sum of its proper divisors (28425198).

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

20439762 is a wasteful number, since it uses less digits than its factorization.

20439762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935 (or 1928 counting only the distinct ones).

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

The square root of 20439762 is about 4521.0355008560. The cubic root of 20439762 is about 273.4168516675.

The spelling of 20439762 in words is "twenty million, four hundred thirty-nine thousand, seven hundred sixty-two".