20210401240 has 32 divisors (see below), whose sum is σ = 45984348000. Its totient is φ = 7993325824.

The previous prime is 20210401153. The next prime is 20210401259. The reversal of 20210401240 is 4210401202.

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, 2834980 + ... + 2842099.

It is an arithmetic number, because the mean of its divisors is an integer number (1437010875).

Almost surely, 2^20210401240 is an apocalyptic number.

20210401240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210401240 is an abundant number, since it is smaller than the sum of its proper divisors (25773946760).

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

20210401240 is a wasteful number, since it uses less digits than its factorization.

20210401240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5677179 (or 5677175 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20210401240 its reverse (4210401202), we get a palindrome (24420802442).

The spelling of 20210401240 in words is "twenty billion, two hundred ten million, four hundred one thousand, two hundred forty".