20140651631 has 4 divisors (see below), whose sum is σ = 20187166272. Its totient is φ = 20094136992.

The previous prime is 20140651627. The next prime is 20140651633. The reversal of 20140651631 is 13615604102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13615604102 = 2 ⋅6807802051.

It is a cyclic number.

It is not a de Polignac number, because 20140651631 - 2² = 20140651627 is a prime.

It is a super-2 number, since 2×20140651631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20140651594 and 20140651603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20140651633) 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, 23256671 + ... + 23257536.

It is an arithmetic number, because the mean of its divisors is an integer number (5046791568).

Almost surely, 2^20140651631 is an apocalyptic number.

20140651631 is a deficient number, since it is larger than the sum of its proper divisors (46514641).

20140651631 is an equidigital number, since it uses as much as digits as its factorization.

20140651631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46514640.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 20140651631 in words is "twenty billion, one hundred forty million, six hundred fifty-one thousand, six hundred thirty-one".