2039921478 has 48 divisors (see below), whose sum is σ = 5053759776. Its totient is φ = 582543360.

The previous prime is 2039921441. The next prime is 2039921483. The reversal of 2039921478 is 8741299302.

It is a super-2 number, since 2×2039921478² = 8322559272811408968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 452998 + ... + 457478.

It is an arithmetic number, because the mean of its divisors is an integer number (105286662).

Almost surely, 2^2039921478 is an apocalyptic number.

2039921478 is an abundant number, since it is smaller than the sum of its proper divisors (3013838298).

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

2039921478 is a wasteful number, since it uses less digits than its factorization.

2039921478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8109 (or 8106 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 2039921478 is about 45165.4899010295. The cubic root of 2039921478 is about 1268.2488685291.

The spelling of 2039921478 in words is "two billion, thirty-nine million, nine hundred twenty-one thousand, four hundred seventy-eight".