20449451532 has 18 divisors (see below), whose sum is σ = 47716542804. Its totient is φ = 6816318720.

The previous prime is 20449451527. The next prime is 20449451557. The reversal of 20449451532 is 23515494402.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 474732 + ... + 516012.

Almost surely, 2^20449451532 is an apocalyptic number.

It is an amenable number.

20449451532 is an abundant number, since it is smaller than the sum of its proper divisors (27267091272).

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

20449451532 is an frugal number, since it uses more digits than its factorization.

20449451532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82569 (or 41286 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 20449451532 in words is "twenty billion, four hundred forty-nine million, four hundred fifty-one thousand, five hundred thirty-two".