20332578 has 32 divisors (see below), whose sum is σ = 49209984. Its totient is φ = 5467392.

The previous prime is 20332577. The next prime is 20332579. The reversal of 20332578 is 87523302.

It is an interprime number because it is at equal distance from previous prime (20332577) and next prime (20332579).

It is not an unprimeable number, because it can be changed into a prime (20332577) 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, 13525 + ... + 14952.

It is an arithmetic number, because the mean of its divisors is an integer number (1537812).

Almost surely, 2^20332578 is an apocalyptic number.

20332578 is an abundant number, since it is smaller than the sum of its proper divisors (28877406).

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

20332578 is a wasteful number, since it uses less digits than its factorization.

20332578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28506.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20332578 is about 4509.1659982751. The cubic root of 20332578 is about 272.9380905920.

It can be divided in two parts, 20332 and 578, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20332578 in words is "twenty million, three hundred thirty-two thousand, five hundred seventy-eight".