37234220021 has 4 divisors (see below), whose sum is σ = 37423226412. Its totient is φ = 37045213632.

The previous prime is 37234219949. The next prime is 37234220071. The reversal of 37234220021 is 12002243273.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12002243273 = 719 ⋅16692967.

It can be written as a sum of positive squares in 2 ways, for example, as 32419803025 + 4814416996 = 180055^2 + 69386^2 .

It is a cyclic number.

It is not a de Polignac number, because 37234220021 - 2¹⁸ = 37233957877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37234220071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94502900 + ... + 94503293.

It is an arithmetic number, because the mean of its divisors is an integer number (9355806603).

Almost surely, 2^37234220021 is an apocalyptic number.

It is an amenable number.

37234220021 is a deficient number, since it is larger than the sum of its proper divisors (189006391).

37234220021 is a wasteful number, since it uses less digits than its factorization.

37234220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189006390.

The product of its (nonzero) digits is 4032, while the sum is 26.

Adding to 37234220021 its reverse (12002243273), we get a palindrome (49236463294).

The spelling of 37234220021 in words is "thirty-seven billion, two hundred thirty-four million, two hundred twenty thousand, twenty-one".