407020523021 has 16 divisors (see below), whose sum is σ = 496729328640. Its totient is φ = 325978611840.

The previous prime is 407020522927. The next prime is 407020523089. The reversal of 407020523021 is 120325020704.

It is not a de Polignac number, because 407020523021 - 2¹⁴ = 407020506637 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 (407020523321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32332856 + ... + 32345441.

It is an arithmetic number, because the mean of its divisors is an integer number (31045583040).

Almost surely, 2^407020523021 is an apocalyptic number.

It is an amenable number.

407020523021 is a deficient number, since it is larger than the sum of its proper divisors (89708805619).

407020523021 is a wasteful number, since it uses less digits than its factorization.

407020523021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64678364.

The product of its (nonzero) digits is 3360, while the sum is 26.

Adding to 407020523021 its reverse (120325020704), we get a palindrome (527345543725).

The spelling of 407020523021 in words is "four hundred seven billion, twenty million, five hundred twenty-three thousand, twenty-one".