20542341420 has 96 divisors (see below), whose sum is σ = 63985521600. Its totient is φ = 5471442432.

The previous prime is 20542341409. The next prime is 20542341433. The reversal of 20542341420 is 2414324502.

20542341420 is a `hidden beast` number, since 2 + 0 + 5 + 4 + 234 + 1 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 440586 + ... + 484974.

It is an arithmetic number, because the mean of its divisors is an integer number (666515850).

Almost surely, 2^20542341420 is an apocalyptic number.

20542341420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20542341420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31992760800).

20542341420 is an abundant number, since it is smaller than the sum of its proper divisors (43443180180).

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

20542341420 is a wasteful number, since it uses less digits than its factorization.

20542341420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45264 (or 45256 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 20542341420 its reverse (2414324502), we get a palindrome (22956665922).

The spelling of 20542341420 in words is "twenty billion, five hundred forty-two million, three hundred forty-one thousand, four hundred twenty".