20454376340 has 24 divisors (see below), whose sum is σ = 43334320680. Its totient is φ = 8109344768.

The previous prime is 20454376303. The next prime is 20454376351. The reversal of 20454376340 is 4367345402.

It can be written as a sum of positive squares in 4 ways, for example, as 917605264 + 19536771076 = 30292^2 + 139774^2 .

It is a super-2 number, since 2×20454376340² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20454376294 and 20454376303.

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, 4523045 + ... + 4527564.

It is an arithmetic number, because the mean of its divisors is an integer number (1805596695).

Almost surely, 2^20454376340 is an apocalyptic number.

20454376340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20454376340 is an abundant number, since it is smaller than the sum of its proper divisors (22879944340).

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

20454376340 is a wasteful number, since it uses less digits than its factorization.

20454376340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9050731 (or 9050729 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 38.

The spelling of 20454376340 in words is "twenty billion, four hundred fifty-four million, three hundred seventy-six thousand, three hundred forty".