20020021007 has 8 divisors (see below), whose sum is σ = 22881098016. Its totient is φ = 17159212512.

The previous prime is 20020020997. The next prime is 20020021009. The reversal of 20020021007 is 70012002002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20020021007 - 2¹⁶ = 20019955471 is a prime.

It is a super-2 number, since 2×20020021007² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20020020982 and 20020021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020021009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132053 + ... + 239745.

It is an arithmetic number, because the mean of its divisors is an integer number (2860137252).

Almost surely, 2^20020021007 is an apocalyptic number.

20020021007 is a deficient number, since it is larger than the sum of its proper divisors (2861077009).

20020021007 is a wasteful number, since it uses less digits than its factorization.

20020021007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134257.

The product of its (nonzero) digits is 56, while the sum is 14.

Adding to 20020021007 its reverse (70012002002), we get a palindrome (90032023009).

The spelling of 20020021007 in words is "twenty billion, twenty million, twenty-one thousand, seven".