1000000020973 has 2 divisors, whose sum is σ = 1000000020974. Its totient is φ = 1000000020972.

The previous prime is 1000000020959. The next prime is 1000000021001. The reversal of 1000000020973 is 3790200000001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 974480916964 + 25519104009 = 987158^2 + 159747^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000000020973 - 2²⁹ = 999463150061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000000020913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500000010486 + 500000010487.

It is an arithmetic number, because the mean of its divisors is an integer number (500000010487).

Almost surely, 2^{1000000020973} is an apocalyptic number.

It is an amenable number.

1000000020973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000000020973 is an equidigital number, since it uses as much as digits as its factorization.

1000000020973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 22.

Adding to 1000000020973 its reverse (3790200000001), we get a palindrome (4790200020974).

The spelling of 1000000020973 in words is "one trillion, twenty thousand, nine hundred seventy-three".