20020400042424 has 32 divisors (see below), whose sum is σ = 50871508308240. Its totient is φ = 6564065587200.

The previous prime is 20020400042381. The next prime is 20020400042491. The reversal of 20020400042424 is 42424000402002.

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 = 20020400042394 and 20020400042403.

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, 6837566857 + ... + 6837569784.

Almost surely, 2^{20020400042424} is an apocalyptic number.

20020400042424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20020400042424 is an abundant number, since it is smaller than the sum of its proper divisors (30851108265816).

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

20020400042424 is a wasteful number, since it uses less digits than its factorization.

20020400042424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13675136711 (or 13675136707 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 20020400042424 its reverse (42424000402002), we get a palindrome (62444400444426).

The spelling of 20020400042424 in words is "twenty trillion, twenty billion, four hundred million, forty-two thousand, four hundred twenty-four".