20700064240749 has 24 divisors (see below), whose sum is σ = 30191237868480. Its totient is φ = 13665675748032.

The previous prime is 20700064240729. The next prime is 20700064240783. The reversal of 20700064240749 is 94704246000702.

It is not a de Polignac number, because 20700064240749 - 2¹³ = 20700064232557 is a prime.

It is a super-2 number, since 2×20700064240749² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20700064240729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34598457 + ... + 35191665.

It is an arithmetic number, because the mean of its divisors is an integer number (1257968244520).

Almost surely, 2^{20700064240749} is an apocalyptic number.

It is an amenable number.

20700064240749 is a deficient number, since it is larger than the sum of its proper divisors (9491173627731).

20700064240749 is a wasteful number, since it uses less digits than its factorization.

20700064240749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630961 (or 630958 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 20700064240749 in words is "twenty trillion, seven hundred billion, sixty-four million, two hundred forty thousand, seven hundred forty-nine".