40450142021 has 16 divisors (see below), whose sum is σ = 44220776448. Its totient is φ = 36884430000.

The previous prime is 40450142009. The next prime is 40450142039. The reversal of 40450142021 is 12024105404.

It is a cyclic number.

It is not a de Polignac number, because 40450142021 - 2³⁰ = 39376400197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40450142221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375605 + ... + 471146.

It is an arithmetic number, because the mean of its divisors is an integer number (2763798528).

Almost surely, 2^40450142021 is an apocalyptic number.

It is an amenable number.

40450142021 is a deficient number, since it is larger than the sum of its proper divisors (3770634427).

40450142021 is a wasteful number, since it uses less digits than its factorization.

40450142021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846872.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 40450142021 its reverse (12024105404), we get a palindrome (52474247425).

The spelling of 40450142021 in words is "forty billion, four hundred fifty million, one hundred forty-two thousand, twenty-one".