20753031487 has 4 divisors (see below), whose sum is σ = 20823861240. Its totient is φ = 20682201736.

The previous prime is 20753031461. The next prime is 20753031493. The reversal of 20753031487 is 78413035702.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20753031487 - 2²³ = 20744642879 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 (20753031427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35414437 + ... + 35415022.

It is an arithmetic number, because the mean of its divisors is an integer number (5205965310).

Almost surely, 2^20753031487 is an apocalyptic number.

20753031487 is a deficient number, since it is larger than the sum of its proper divisors (70829753).

20753031487 is an equidigital number, since it uses as much as digits as its factorization.

20753031487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70829752.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 20753031487 in words is "twenty billion, seven hundred fifty-three million, thirty-one thousand, four hundred eighty-seven".