20022021437 has 16 divisors (see below), whose sum is σ = 22099262400. Its totient is φ = 17987840640.

The previous prime is 20022021413. The next prime is 20022021449. The reversal of 20022021437 is 73412022002.

It is a happy number.

It is not a de Polignac number, because 20022021437 - 2⁶ = 20022021373 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 (20022021497) 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, 2403203 + ... + 2411519.

It is an arithmetic number, because the mean of its divisors is an integer number (1381203900).

Almost surely, 2^20022021437 is an apocalyptic number.

It is an amenable number.

20022021437 is a deficient number, since it is larger than the sum of its proper divisors (2077240963).

20022021437 is a wasteful number, since it uses less digits than its factorization.

20022021437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10876.

The product of its (nonzero) digits is 1344, while the sum is 23.

Adding to 20022021437 its reverse (73412022002), we get a palindrome (93434043439).

The spelling of 20022021437 in words is "twenty billion, twenty-two million, twenty-one thousand, four hundred thirty-seven".