20265551007 has 24 divisors (see below), whose sum is σ = 29268472464. Its totient is φ = 12467130624.

The previous prime is 20265551003. The next prime is 20265551023. The reversal of 20265551007 is 70015556202.

It is not a de Polignac number, because 20265551007 - 2² = 20265551003 is a prime.

It is a super-4 number, since 4×20265551007⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20265551003) 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, 2813803 + ... + 2820995.

It is an arithmetic number, because the mean of its divisors is an integer number (1219519686).

Almost surely, 2^20265551007 is an apocalyptic number.

20265551007 is a deficient number, since it is larger than the sum of its proper divisors (9002921457).

20265551007 is a wasteful number, since it uses less digits than its factorization.

20265551007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12779 (or 12766 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 33.

The spelling of 20265551007 in words is "twenty billion, two hundred sixty-five million, five hundred fifty-one thousand, seven".