20742578707 has 2 divisors, whose sum is σ = 20742578708. Its totient is φ = 20742578706.

The previous prime is 20742578663. The next prime is 20742578777. The reversal of 20742578707 is 70787524702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20742578707 - 2³¹ = 18595095059 is a prime.

It is not a weakly prime, because it can be changed into another prime (20742578777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10371289353 + 10371289354.

It is an arithmetic number, because the mean of its divisors is an integer number (10371289354).

Almost surely, 2^20742578707 is an apocalyptic number.

20742578707 is a deficient number, since it is larger than the sum of its proper divisors (1).

20742578707 is an equidigital number, since it uses as much as digits as its factorization.

20742578707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536640, while the sum is 49.

The spelling of 20742578707 in words is "twenty billion, seven hundred forty-two million, five hundred seventy-eight thousand, seven hundred seven".