402020042024 has 8 divisors (see below), whose sum is σ = 753787578810. Its totient is φ = 201010021008.

The previous prime is 402020041993. The next prime is 402020042101. The reversal of 402020042024 is 420240020204.

It can be written as a sum of positive squares in only one way, i.e., 311232325924 + 90787716100 = 557882^2 + 301310^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×402020042024² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402020041987 and 402020042005.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25126252619 + ... + 25126252634.

Almost surely, 2^402020042024 is an apocalyptic number.

It is an amenable number.

402020042024 is a deficient number, since it is larger than the sum of its proper divisors (351767536786).

402020042024 is a wasteful number, since it uses less digits than its factorization.

402020042024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50252505259 (or 50252505255 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 402020042024 its reverse (420240020204), we get a palindrome (822260062228).

The spelling of 402020042024 in words is "four hundred two billion, twenty million, forty-two thousand, twenty-four".