10157768021 has 4 divisors (see below), whose sum is σ = 10256387232. Its totient is φ = 10059148812.

The previous prime is 10157768003. The next prime is 10157768113. The reversal of 10157768021 is 12086775101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12086775101 = 31 ⋅389895971.

It is a cyclic number.

It is not a de Polignac number, because 10157768021 - 2⁶ = 10157767957 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 (10157768321) 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, 49309451 + ... + 49309656.

It is an arithmetic number, because the mean of its divisors is an integer number (2564096808).

Almost surely, 2^10157768021 is an apocalyptic number.

It is an amenable number.

10157768021 is a deficient number, since it is larger than the sum of its proper divisors (98619211).

10157768021 is an equidigital number, since it uses as much as digits as its factorization.

10157768021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98619210.

The product of its (nonzero) digits is 23520, while the sum is 38.

The spelling of 10157768021 in words is "ten billion, one hundred fifty-seven million, seven hundred sixty-eight thousand, twenty-one".