20542100424 has 32 divisors (see below), whose sum is σ = 51624138240. Its totient is φ = 6811515200.

The previous prime is 20542100419. The next prime is 20542100459. The reversal of 20542100424 is 42400124502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20542100394 and 20542100403.

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, 2236047 + ... + 2245214.

It is an arithmetic number, because the mean of its divisors is an integer number (1613254320).

Almost surely, 2^20542100424 is an apocalyptic number.

20542100424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20542100424 is an abundant number, since it is smaller than the sum of its proper divisors (31082037816).

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

20542100424 is a wasteful number, since it uses less digits than its factorization.

20542100424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481461 (or 4481457 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 20542100424 its reverse (42400124502), we get a palindrome (62942224926).

The spelling of 20542100424 in words is "twenty billion, five hundred forty-two million, one hundred thousand, four hundred twenty-four".