20124537701 has 4 divisors (see below), whose sum is σ = 20132183532. Its totient is φ = 20116891872.

The previous prime is 20124537679. The next prime is 20124537707. The reversal of 20124537701 is 10773542102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6646488676 + 13478049025 = 81526^2 + 116095^2 .

It is a cyclic number.

It is not a de Polignac number, because 20124537701 - 2¹⁸ = 20124275557 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 (20124537707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3818966 + ... + 3824231.

It is an arithmetic number, because the mean of its divisors is an integer number (5033045883).

Almost surely, 2^20124537701 is an apocalyptic number.

It is an amenable number.

20124537701 is a deficient number, since it is larger than the sum of its proper divisors (7645831).

20124537701 is an equidigital number, since it uses as much as digits as its factorization.

20124537701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7645830.

The product of its (nonzero) digits is 11760, while the sum is 32.

The spelling of 20124537701 in words is "twenty billion, one hundred twenty-four million, five hundred thirty-seven thousand, seven hundred one".