20021237036 has 48 divisors (see below), whose sum is σ = 37583831040. Its totient is φ = 9311319360.

The previous prime is 20021237003. The next prime is 20021237069. The reversal of 20021237036 is 63073212002.

It is an interprime number because it is at equal distance from previous prime (20021237003) and next prime (20021237069).

It is a junction number, because it is equal to n+sod(n) for n = 20021236996 and 20021237014.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 789425 + ... + 814391.

It is an arithmetic number, because the mean of its divisors is an integer number (782996480).

Almost surely, 2^20021237036 is an apocalyptic number.

It is an amenable number.

20021237036 is a deficient number, since it is larger than the sum of its proper divisors (17562594004).

20021237036 is a wasteful number, since it uses less digits than its factorization.

20021237036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25254 (or 25252 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

Adding to 20021237036 its reverse (63073212002), we get a palindrome (83094449038).

The spelling of 20021237036 in words is "twenty billion, twenty-one million, two hundred thirty-seven thousand, thirty-six".