1957321950 has 24 divisors (see below), whose sum is σ = 4854158808. Its totient is φ = 521952480.

The previous prime is 1957321943. The next prime is 1957321957. The reversal of 1957321950 is 591237591.

It is an interprime number because it is at equal distance from previous prime (1957321943) and next prime (1957321957).

It is a super-2 number, since 2×1957321950² = 7662218431903605000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957321957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6524257 + ... + 6524556.

It is an arithmetic number, because the mean of its divisors is an integer number (202256617).

Almost surely, 2^1957321950 is an apocalyptic number.

1957321950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1957321950 is an abundant number, since it is smaller than the sum of its proper divisors (2896836858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1957321950 is a wasteful number, since it uses less digits than its factorization.

1957321950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13048828 (or 13048823 counting only the distinct ones).

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 1957321950 is about 44241.6314120535. The cubic root of 1957321950 is about 1250.8947087775.

The spelling of 1957321950 in words is "one billion, nine hundred fifty-seven million, three hundred twenty-one thousand, nine hundred fifty".