20354204240 has 40 divisors (see below), whose sum is σ = 47334593160. Its totient is φ = 8139777536.

The previous prime is 20354204237. The next prime is 20354204251. The reversal of 20354204240 is 4240245302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33131536 + 20321072704 = 5756^2 + 142552^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343526 + ... + 398394.

It is an arithmetic number, because the mean of its divisors is an integer number (1183364829).

Almost surely, 2^20354204240 is an apocalyptic number.

20354204240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20354204240 is an abundant number, since it is smaller than the sum of its proper divisors (26980388920).

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

20354204240 is a wasteful number, since it uses less digits than its factorization.

20354204240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59519 (or 59513 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

Adding to 20354204240 its reverse (4240245302), we get a palindrome (24594449542).

The spelling of 20354204240 in words is "twenty billion, three hundred fifty-four million, two hundred four thousand, two hundred forty".